The problem with Dat is this is the third time we've seen him and he's going to have to recycle material eventually. We've seen Ralphie once before also, but the other 3 comics are fresh to us since we haven't seen them perform before (other than the tryouts before they moved in the house). On Dat, on his first challenge we saw mom jokes, but his second challenge had no mom jokes at all and I thought he was pretty good that time proving he's not all mom jokes. Last night he was about 50-50.
Personally, I thought Ralphie sucked. He had about 2 funny jokes which he managed to stretch out to 5 minutes. Tess was horrible and annoying. The other 3 were equally mediocre. If I were to vote, it would be for Dat probably, because in general I like him the most and nobody was really very funny last night.