Yeesh, you wanted to cut him in his rookie year? Harsh!
I think we can plainly contribute Quick's recent success to development. I've been disappointed in how plenty of other players have progressed (or more to the point, HAVEN'T progressed), but Quick is a fine example of a player for whom it just takes time for the light to come on. He always had the physical talent, he just needed to learn how to utilize it, whilst also handling the mental aspect of the game. All that seems to come together for him now. Maybe next year, we can finally enter a draft without putting WR near the top of our needs?