Haloti Ngata, one of the best D-Lineman in the NFL, was taken 14th overall.
The leading sack-man this season was an undrafted free agent (originally signed by the GMen - do those guys know pass-rushers or what? Shesus). Yes, he's an OLB, but that's basically a DE in the 3-4 system.
The rest of the top sack artists DL this season:
John Abraham - 10th overall (after LaVar, lol)
Jason Babin - 27th overall
Osi Umenyiora - 56th overall
Jared Allen - 126th overall
Chris Clemons - UDFA (hmmm...seems familiar....:doh
Trent Cole - 146th overall
Charles Johnson - 83rd overall
Robert Mathis - 138th overall
Justin Tuck - 74th overall
The point is DL is actually one of those positions where high draft position is less important than say, QB.