That said, I wonder if blowing dry would be necessary on the belt as well; it might accumulate a similiar amount of wet dirt which might wear the teeth. I think regular wet rides would be a very severe test. Might also affect the slipping.
I'm impressed - you blow out your chain with a compressor! Wow, you take good care of your bikes!
I agree, if the belt drive got wet and dirty, it would be equally, if not more, destructive. I would think the belt is easier to clean than the chain, though. Less places for the grime to accumulate.