Football Outsiders just did their 2010 Best Cornerbacks Charting Stats (major hap tip to my man Orang3b). Our own Brent Grimes received several mentions:
4th in yards/pass - he had 111 charted targets (which does not count hail mary passes, passes where the receiver was hit in motion, passes that were tipped at the line, passes that were thrown away, or wide receiver screens); interestingly enough, of the top ten CBs in yards/pass (minimum 40 charted passes), he had 28 more charted passes than any of the other ten (and significantly more than the top three)
11th in success rate - in case you forgot, success rate is:
[T]he percentage of passes that don't manage to get at least 45 percent of needed yards on first down, 60 percent of needed yards on second down, or 100 percent of needed yards on third down.
Tied for 4th in yards after catch - once again, of the top ten CBs in YAC, Grimes had 14 more targets than any of the other ten
In case you don't want to read the article and want me to spoil the ending, Dunta wasn't top ten in any of their charting categories. Not implying anything with that observation, only making it. As Vishnu Falcon pointed out, while Dunta was targeted 9.5 percent of the time he was on the field, Grimes was targeted 12.1 percent of the time he was on the field. And to that effect, Dunta likely covered the better WR more often than not. In any case, it's an interesting read if you have a few minutes.