Get there a hell of alot quicker from a stop, that's for damn sure!

I really haven't noticed any major slow down, it will be less than that from the 1" > 1.375" track though, I would say like 1-2 mph if at all. Everyone has them, so it's equal again..
It's just not on the ice, the trail is 10x better. The back end follows the skis perfectly, no "slushy" feeling in the back when it is freshly groomed, braking on the snow is highly reduced as well... when you are ripping studless, you can't stop for squat if you need to, it's alot safer like everyone has said. You can ride alot faster though, and be in the same control, if not better, with them than without them. I'd like to see someone go "fast" without.
I'm pro-studs eh?
-matt