Well, they are saying 12 bolt gears, and with the pinion higher, I doubt the support bearing is possible.

I don't exactly agree with someone calling the 9" a power robber, there was a 1.5% difference in power output, which could be caused by a simple temperature or barometric change. Maybe they accounted for that, don't remember reading that though. Did anybody see if they accounted for "weather/altitude" change?

Overall it was a really interesting test of rears, but what if bearing pre-load is on the high side of one rear, and low on the other.

I no doubt learned something there, but it wouldn't change my mind as to which rear I would choose.