Can you honestly say it was the wrong decision? Plus, there were a lot of people on this site - well, maybe it was one poster who liked to post the same thing over and over and over again - who felt he wasn't going to be much because he didn't think Trevor was much either. Even after his freshman year where he was a 8th or 9th man in the rotation, the prevailing sentiment here was that Winter was a bullet dodged. How many guys have we seen this pattern of growth with at Wisconsin?
Winter's skills fit the Wisconsin system like a glove, they wanted him, and they had a role for him to grow into. Minnesota under Johnson didn't even have a system. No-brainer.