Sorry, but it is. I love Sunshine, I really do. But it's not close to #1 in North America. A USA Today readers on line poll isn't the best measure of greatness. Any list that excludes Whistler, Revelstoke, Breckenridge, Snowmass and Jackson's Hole to name just a few is god awful.
Mount Bohemia makes nobody's top 10 except maybe those that live within 2 hours of it. 900 feet of vertical and 274 " of snow is nice for Michigan, but it pales in comparison to big boys. Whistler has over 5,000 feet of vertical and gets over 400" of snow annually. It's just not close.
Geez, I can name 5 ski resorts east of the Mississippi that are better: Killington, Sugar Bush, Whiteface, Tremblant, Smuggler's Notch.