Has anybody noticed a difference in power delivery with full circle crank?

Just wondering. My personal experience with a full circle crank on a sport pro top end was a big reduction in power below 6k rpm, similar output between 6k and 10k and improvement in power from 10k upwards. In fact I gained 2000rpm of usable power on my engine allowing it to rev out to 12.5 instead of 10.5.

People said I was mad and that it doesnt make much difference but my thoughts were verified by a few people on one of the german scoot forums.

What have your own experiences been as I never see it mentioned on any UK forums?