Spoke with a doo factory racer that just tested a 900T. Said it did have good power, but felt much heavier than an 850. Most importantly, he didn't feel it had turbo lag, but throttle lag. Said that electronic throttle causes a delay. You would need to think ahead and time a launch off of a crest. Very good high mileage trail sled for cruising, but can not shine the shoes of an 850. Guys that ride hard corner to corner will be disappointed. That sealed the deal for me... unloading my 17 800 Pro-S LE for a 850 XRS.