I haven't exactly been studying these guys, so I bet someone else could get you some more in-depth answers, but this is, in short, what I've been seing so far.
Colledge has been his inconsistent self. He's totally turning around guys on one play and making holes where you and I could run through on one play and get his behind whooped by an ILB on the next. He was decent in week 1, if I recall correctly. Very up and down this week. Maybe even more down than up.
Can't say a lot about Wells. Not great, not bad. No stand-out plays at all. Either negative or positive.
Sitton has been his solid self. He's just been mostly shutting down whoever he's been facing, it seemed.
Again, I haven't exactly been watching them closely on every play, so someone else might be able to help you out a bit more.