More concise entries in 'read operations' table of contents.

Signed-off-by: Sam Kleinman <samk@10gen.com>
Clarify 'nearest'

Signed-off-by: Sam Kleinman <samk@10gen.com>
Remove over-general statement about specifying read prefs.

Different clients have different degrees of flexibility; one sentence can't capture the nuances.

Signed-off-by: Sam Kleinman <samk@10gen.com>
Fix description of tag sets.

Signed-off-by: Sam Kleinman <samk@10gen.com>
Clarify that tags are not compatible with read mode 'primary'.

Signed-off-by: Sam Kleinman <samk@10gen.com>
'nearest' means lowest-latency.

Signed-off-by: Sam Kleinman <samk@10gen.com>