If you're ONLY considering the size, attractiveness, and culture, of the city.... then no, Barcelona to Minnesota is not a leap.
if you consider the difference between professional Barcelona basketball and professional Minneapolis basketball, in terms of its physicality and overall athleticism and skill, then yeah I'd say its one hell of a leap.
You are right. Because Barca is way better than the Wolves are. Quite a leap downwards in level for him.
It depends, is he going to guard points guards or slide over and check 2s a la Jason Kidd? He has to size to guard most shooting guards and it would give the Wolves a competitive advantage if they could defensively afford to play an Aaron Brooks or Terry type at shooting guard and have them switch on defense. I could also see him putting on weight in order to help himself finish inside, since that's been a problem for him in Europe and he's damn sure not scaring anyone with his jumper.