Actually, I'm pretty sure that, from a mechanical standpoint, bleeding (or any form of internal damage) is mechanically identical to burning (or any form of elemental damage). I recall someone doing some analysis nearly a year ago wherein they found that pretty much anything that increased or was affected by elemental damage had the exact same effect upon internal damage and vice versa. "Burning" and "bleeding" are descriptive terms that mean anyone taking internal or elemental DoT damage, regardless of what damage type it is; you could replace all instances of "burning" with "bleeding" or vice versa and it wouldn't make any difference whatsoever.
If that is the case, then my case is definitely moot. It's the first thing I've heard about it though. I guess I'll have to do some testing myself with a friend.
Edit: The problem with what you're saying is that I know Elemental and Internal have different crit chances. Doesn't have to have anything to do with it. But it makes me wonder. Anyway, I'll do some testing when I can.