We do have recent examples of a player coming here and finding success:
You know that Gilmour had his best season ever playing for the blue + white right?
How about Lupul and Kessel having career years in Toronto? Eddie, Cujo did alright...oh yeah there was that Dougie guy too as you mentioned. Mats had an okay career with the Leafs.....Mogilny was no slouch wearing blue and white. How about Dion? A lot of people on these boards seem to think he is thriving as captain of the Leafs...although I don't agree. Plenty of guys come to Toronto and find success. Probably just as many as there are that fall flat on their face.