Yes, that is correct. A 15 Amp outlet can deliver more power than 15 Amps for a short period, as there is no circuit breaker fitted to the generator as standard. You can briefly pull the full rated power amount of the generator (continuous and maximum) through the 15 Amp outlet.. noting that this is only for a short time - i.e. when you are first starting up an appliance such as a comprossor, drop saw, air conditioner etc. it may draw around 30 Amps (as an example) to start up, and then drop back down to 10 Amps to keep running.
However, if your appliance draws more than 15 Amps continuously, it is not recommended you run it for prolonged periods from a 15 Amp outlet, as it is likely to result in overheating issues. It may be prudent to consider re-fitting the outlets to a larger size to fit your continuous power requirement (i.e. 20 Amp, or 32 Amp outlet for example) - this can be configured upon request at extra cost. Thank you.