Thanks khodges.
I know that guys who fly at altitiude (like in Colorado) will benefit from higher nitro as the thinner air does make model engines as well as full size ones, lose some power.
As for those who claim that engines like OS LA. 46's and also Super Tigre's need 20 % plus nitro fuel at or near sea level?
Well yes, as I said, there are many myths and legends generated on this website about nitro, which keep me entertained for hours.