As one who spent a season in Jackson, 4 in No Tahoe and numerous trips to Whistler, Utah, Taos etc my own opinion is that places such as Snowbird and Whistler and Jackson are all in the same ballpark. Tahoe to me just has lots of short steeps(yes, quite steep) but nothing remotely sustained and so isn't in the same league.
I think S&S is probably the toughest in-bounds bit I have seen and agree that Corbets isn't rediculously hard, although it does get the blood running because of the setting. The Tram, gapers gawking, rock walls surrounding the landing area which is usually on the hard side unless following Bob off the early Patrol tram.
Jackson really isn't overated, is bigger than the bird, has more vert, and has unbelievable backcountry. The bird more snow and more consistent conditions and some definite steeps. Whistler does have everything because of the sheer size, which has become a bit of a draw back in the last bunch of years, but you have to love the terrain, backcountry, and steeps that are there. All great places to make some turns, and they give you a better chance of those turns being in the fresh than most.