A system, comprising: a memory or other storage device configured to store for each of a plurality of implementations (714, 716, 718) of a computing resource a corresponding behavioral profile data comprising for each of a plurality of observed behavioral patterns observed to have been exhibited by an implementation a corresponding summary representation of one or more characteristic traits of the behavioral pattern, wherein each of said computing resources comprises one or more of a device, a hardware platform, a virtual machine, a container, an application or other software, a configuration, a protocol, a standards-based resource, a physical or logical storage device, a database, and a service; and a processor coupled to the memory or other storage device and configured to: read and use at least portions of said behavioral profile data associated with one or more implementations included in a cohort comprising a sub-population of said plurality of implementations identified by configuration data as being associated with said cohort to determine that an observed behavior of a member implementation of the cohort deviates from an expected behavior of members of the cohort; wherein the system is characterized in that the processor is further configured to: receive a request associated with said sub-population of said plurality of implementations; select two or more implementations within said sub-population to process the request; receive from each a response to the request; compare the responses; determine, based at least in part on the comparison of the responses, a statistical mode response to be provided in response to the request; detect that an outlier response not consistent with said statistical mode response was returned by one or more of said two or more implementations; and take responsive action with respect to said one or more implementations that provided the outlier response. a memory or other storage device configured to store for each of a plurality of implementations (714, 716, 718) of a computing resource a corresponding behavioral profile data comprising for each of a plurality of observed behavioral patterns observed to have been exhibited by an implementation a corresponding summary representation of one or more characteristic traits of the behavioral pattern, wherein each of said computing resources comprises one or more of a device, a hardware platform, a virtual machine, a container, an application or other software, a configuration, a protocol, a standards-based resource, a physical or logical storage device, a database, and a service; and a processor coupled to the memory or other storage device and configured to: read and use at least portions of said behavioral profile data associated with one or more implementations included in a cohort comprising a sub-population of said plurality of implementations identified by configuration data as being associated with said cohort to determine that an observed behavior of a member implementation of the cohort deviates from an expected behavior of members of the cohort; wherein the system is characterized in that the processor is further configured to: receive a request associated with said sub-population of said plurality of implementations; select two or more implementations within said sub-population to process the request; receive from each a response to the request; compare the responses; determine, based at least in part on the comparison of the responses, a statistical mode response to be provided in response to the request; detect that an outlier response not consistent with said statistical mode response was returned by one or more of said two or more implementations; and take responsive action with respect to said one or more implementations that provided the outlier response. read and use at least portions of said behavioral profile data associated with one or more implementations included in a cohort comprising a sub-population of said plurality of implementations identified by configuration data as being associated with said cohort to determine that an observed behavior of a member implementation of the cohort deviates from an expected behavior of members of the cohort; wherein the system is characterized in that the processor is further configured to: receive a request associated with said sub-population of said plurality of implementations; select two or more implementations within said sub-population to process the request; receive from each a response to the request; compare the responses; determine, based at least in part on the comparison of the responses, a statistical mode response to be provided in response to the request; detect that an outlier response not consistent with said statistical mode response was returned by one or more of said two or more implementations; and take responsive action with respect to said one or more implementations that provided the outlier response.