Yes. Paul said that you can lean around corners and over objects - it's also shown in vids.
Last I heard, on console, leaning in and out of cover is done by holding ironsights + left, right, or up on the Dpad to peek around.
I would probably assume that leaning to the left and right on the PC version is done with Q and E respectively.
I think however that Wake might be thinking that there is some form of cover system. This does not exist; however, leaning, as Awesome said, does, and should be sufficient for Brink.