Lets do some trend analysis here. Shockey gets traded and Boss steps up and puts up good numbers. Boss leaves via free agency and another unknown starts producing (I forgot the kids name). The unknkown gets an ACL adn Bennett produces. Toomer retires, Plax fiasco occurs, and Steve Smith leaves us, Nicks and Cruz, and Manningham give us an even deadlier WR core. Now Barden is showing signs of being the latest to produce. The two constants here is for one KG and his offensive system, but more important is Eli. I think Eli has the ability to what Trent Dilfer terms "throw receivers open". His best attribute by far as a quarterback is his anticipation on his throws. As soon as the receiver makes the cut the ball is in his hands. This means Eli threw it before he made the cut sometimes a good bit before he cuts, so not that much separaton is needed.
Bottom line is that I think as long as we have Eli we'll see good receivers put up great numbers and mediocre receivers look good because Eli's anticipation allows him to get them the ball as soon as they get separation. So as we hail Barden the latest new kid on the block to produce we should really be hailing Eli as well.