I don't think you're blind, and I do think you're a good poster, but I have a pet-peeve with the if-everything-goes-right discussion. I see no point in discussing if everything goes right, so-and-so's potential exceeds Crosby's!, or something along those lines. There's just not much point in them. Nothing ever goes absolutely right.
When discussing potential, why not try to be realistic? It's understood that we'll make assumptions on the optimistic side (i.e. the player, first of all, makes the NHL; secondly, we assume no hindering injuries, few problems adjusting their game to the pros, etcetera.). Beyond this, I see no point in making optimistic assumptions. They are too far removed from reality to be worthwhile.
Mueller's a good, dynamic offensive talent. But he's not a rare talent. I would wager most NHL clubs feel confident they have a talent in their prospect pool roughly equivalent to Mueller. So to claim Mueller, in his prime, can achieve a 110-120 point-level--which is something even Crosby (yes, I know he's 19) has trouble achieving; a level which the Thorntons, Jagrs of the league attain only rarely, and elite offensive talents such as Spezza, Heatley, Lecavalier, et al. have yet to ever achieve is, well, a little beyond optimistic and realistic. These elite talents were better players in their pre-NHL career than Mueller has been, and yet they have trouble surpassing the 100-point mark.
For my own prediction: I would say Mueller more realistically will fall in the 65-80 point range in his prime, which--contrary to predictions on potential around here--is still very, very good, and worthy of being a good, but not spectacular first-line impact player.