This thread is weird. With racing anything....you can set something (car ,sled, bike, whatever) up to holeshot well even if it has a power disadvantage. BUT, the power disadvantage will always always rear its head somewhere.
A track that spins on hardpack could possibly be a good deep powder track, a suspension that doesn't hook well from a dig could possibly still work well for hill climbing, low gearing or clutching will give up top end, yada yada.
Lets be real an skip all the sillyness tho.....all else equal, a stock or stage kit sled ain't beating a half-ass or better turbo. Nay
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What this has to do with 850 initial impressions? No idea. I haven't seen Polaris or anyone else on this forum who claimed this would be a turbo killer. If anyone thought a stock 170hp sled was going to feel like a turbo, they would be setting up for disappointment. Doesn't sound like OP was expecting that, but it keeps coming up.
So far reviews from SC clients have been awesome. Just had a great rider in here this morning ranting about the engine and front end changes. I am surprised to hear anyone finding the front end "not that noticeable"....it was immediately apparent to me....first sidehill. Again what is the expectation I suppose....if you're thinking snow bike, you're gonna fall short.
There have been some complaints that it runs super rich until you get further into/beyond break in...but outside of that people seem to be loving it. Just need more snow.