Once I have more miles and feel on my new bikes I'll be doing direct feel tests, maybe even timing tests. Other than getting bad gas someplace, I agree with the quicker burn / better HP idea. If the higer octane explodes SLOWER than it should when the bike is timed for 87ish, it can only slow you down a tad. Since Busa is designed for the road and average gas, that might be best. I've always been curious about this, nows my chance to find out for sure.