I did some kiting in the launch period inferno as well, but that was because it was the only way we could take down quite a few elite packs back then (wizard, in Whimseyshire farming quite a bit). It worked sometimes, but mostly didn't for reasons stated. Wasn't ideal, very slow actually but a way to kill some packs there were otherwise unkillable. Lots of deaths; some animations/attacks simply cannot be outrun and when kiting you're depending on the fact that attacks will not reach you.
In the current state kiting is not very viable in higher Monster Powers, much less optimal. Possible? Maybe. Maybe I shouldn't have said not an option, but enemies, and especially packs, have way too many HP. I'm currently solo farming MP9 with my wizard and wouldn't be able to do half that with any kiting build.