I recently was flipping the PWR/snow switch and was wondering if it actually does anything, because I dont feel it. What is it supposed to do exactly in these three positions??

 

Same thing it does on the Ferrari - it controls throttle (esp. gear shifting) response. On power mode, the car will be much more sensitive to increases in pedal force and also much more likely to downshift when you depress the pedal. During acceleration, it'll also keep you in a gear longer before upshifting. I've never used Snow mode, but I'd imagine it'd simply be less sensitive and downshift less, and perhaps start in 2nd gear.

You won't "feel it" in the sense of "power" because that's not what it's for, but I'm surprised you haven't "felt it" because the additional responsiveness and downshifts in power mode is significant. It's extremely sensitive on my '03 LS430.

 

In my '01 UL, with pwr on, I get more throttle response, more agressive shifts, higher full throttle upshifts, and quicker downshifts.

With the snow on, the car starts in second gear from a standstill. Works well in stop and go traffic..

 

Yes, thats all correct. Also with snow mode on, you won't be able to give it as much throttle since it will be electronically controlled to prevent wheelspin.