I think the draft analst(s) quoted in the article are spot on for Bennett and Grant, but optimistic for Smith and Heuerman. My best guess:
Michael Bennett - second round, perhaps early side of round 2
Doran Grant - middle rounds (3-5) seems right
Jeff Heuerman - late rounds 5-6. Can't see him getting selected before Nick O'Leary from FSU no matter what Heuerman does at the combine. Will have great measurables, but only 'good' film.
Devin Smith - middle rounds. I don't see how his lack of short to medium receptions won't hurt him. Unless he improves there, teams should give him a cushion and make sure he doesn't get behind them. No catches at the Senior Bowl.
More important than the draft position, all 4 of these guys will make a 53 man roaster next fall. We have some guys who will be undrafted free agents who will make a serious run at a roaster next year.