Well, as someone who goes to UPS I would disagree, but this has to do with the type of skiing you want to do.
If you want to have access to the best terrain and pretty limited crowds, UPS is actually closer to good skiing than UW (Baker is in a league of its own....but if he is looking for a good school than WWU is out). Crystal is 1hr 20 minutes from campus. Compared to Stevens, the terrain is much better and it is much less crowded. Even when it is crowded the lifts/access to BC allow you to avoid crowds much easier. Alpental is about 1hr 20minutes from here as well (while being 40 minutes from UW) but while there terrain there is extremely sick, it is low (heavier snow), much much smaller, and gets extremely crowded.
The only reason not to choose Snoqualmie over Crystal is because of a park, which crystal lacks. If you could care less about park and would rather ski stuff like such.....
than crystal is where to be.
I looked at a lot of schools (CU, UW, UU, UBC....on and on..) and for combinition of academics & small class size + skiing, UPS was my favorate. I was born and raised in Boulder and had been skiing in CO for 15 years.....extremely glad I got out of there. CO skiing (in-bounds) gets old pretty quick. WA is much sicker.