Although I didn't pay much attention to this while testing out the bar (I wanted to keep that to strictly "by the numbers" stuff), I did play around with that matchup today for a while in practice mode. It does what you'd expect - a lot of occurences of the bump and then the WR getting forced to the outside. As long as the CB has help over the top, it's extremely difficult to complete any type of pass in a situation like that. Only once or twice out of about 20 tries did the WR get on the inside, and even then it would have been an extremely small window for a completion. A WR disadvantage that great seems pretty noticeable in an actual game situation.
Tested on All-American, btw.