Personally I would like to see some race data from guys who have ran both a 2S lipo in race conditions as well as a 3S lipo in race conditions.

Combine the info with some sort of gearing / mph spreadsheet so it can be broken down as far as what motor combined with what battery pack yields X speed, etc.

After that, determine is there a real world benefit. Reason I say that is because do we increase race costs by going from 2S - 3S lipo, but, dropping to a lower KV motor.

Seems the KV doesn't matter on a motor with regards to price at all. Various faster or slower brushless motors seem to all cost about the same.

If you could get an equal cost between a 3S lipo set and X brushless motor setup compared to a 2S lipo setup and Y brushless motor setup, but get better reliability, cooler temps, and ultimately a safer setup, who knows, may be worth a look.