I don't know much about DRC but ACromartie played at Florida St. and DRC played at Tennesee St. That doesn't mean he isn't talented but it does give you little insight on where people see his talent level compared to ACromartie.
As has already been pointed out several times on this board - Dominique Rodgers-Cromartie's choice (or lack thereof) of College had more to do with the fact that he went to four High Schools in four years, due to a series of events beyond his control.
So before anyone condemns this kid as a 'flash in the pan' from a small school, who won't be able to produce on the big stage, do a little research in why it was that he ended up at said school. Personally, I think he looks special. I don't care if he is related to Antonio Cromartie, Deion Sanders or Donald Duck for that matter... To me, this kid is looks like he could have a great career and at this stage, before any of them have played a down in the NFL, that's all we can say about any prospect in the draft.