Based on his posts in this thread, I suspect Chase Stuart will say that those predicting Welker to have a good year like he is having, had no idea that the Patriots entire offense would blow up the way it has, and that his numbers are a reflection of the entire Patriots passing game flourishing.
If NE had put up numbers similar to those they have had with Brady, Welker wouldn't come close to the numbers he is at. Now, it would be easy to say that Welker is a big reason why the offense has been so good, but I think it is the other way around. He has been better than I gave him credit for being, but I think many possession WRs in the NFL could have similar numbers if they had his spot in the NE lineup. Welker is open constantly, as defenses are always terrified of getting beat by Moss and Stallworth (who is a deep threat, when healthy), not to mention that the WRs have forever to try and get open, with as much time as Brady is given on almost every play by his offensive line. With as many weapons as they have in that offense, heck, I think I could catch 50 balls for them!

Please note that my tongue in slightly in cheek with those last few comments.