definetely yes! I used this method because my dick was really bent downwards like hell. After one year it is at least a lil bit more straight.
I don't know first-hand, but i would think that the difference in "slack" would make it more likely that a curve might be developed or exaggerated through intensive jelqing for a circumcized dick. certainly my experiences based on the guys i've known would seem to bear that out. however, given that everyone is different anyways, i doubt that it would normally be a significant factor either way.