My observation is that a lot of the people who whine about how difficult it's going to be honestly do fine in the end. I think the same straightforward from-the-heart-ness that leads them to say "man this sucks, I hate this" helps them a lot when things get real.
Bill Burr did the same thing. He whined a lot about it and then Sean told him he didn't have to do the last dab and he got all mad and said gimme that fuckin' thing.