RVB Draft Potential?

I'm curious what the board thinks of some of our seniors' draft potential, but specifically RVB. I know it seems that Molk is highly rated, even though he is a little undersized, and Martin is a beast, although a bit on the small side for a DT as well. But what about Van Bergen? I feel like he could be a very solid NFL defensive lineman. He's got the size (6'6", 288), I think it's apparent he's got the smarts (as evidenced by him talking about the decisions he and Mike make on the field), yet CBS Sports has him ranked as the #25 DE in this class (LINK). I'm just curious why. Compared to other, more highly-rated prospects on their list, he's definitely not under-sized. His 40-time is a little slower than some of the fastest guys there, but those guys don't have the size that he does, and does one-tenth of a second really make that much of a difference? I haven't read a scouting report on him, so I don't know much more than what I've observed the last few years, but I feel like he could be a Kyle Vanden Bosch-type defensive end (and not just because they both have Van in their last name). What say the rest of you?