"Three months ago, I said -- if you watch this kid on tape -- if you like him, he's Anquan Boldin..."
I'm not knocking Allen (or Boldin). But Allen is not a similar type WR as Anquan Boldin. Not the Boldin of today or the Boldin of the 2003 draft. They're similar in that they both battled knee injuries during their respective draft periods. Boldin is much more physical, while Allen relies on quickness.
If I were going to compare a WR prospect to Allen, it would be former Seahawk Koren Robinson. Good size, but very quick with excellent run after catch ability. Unfortunately, drug issues and later a knee injury cut Robinson's career short. He could have been a Pro Bowl WR.