Eh, I thought it was pretty funny. This season has been wildly inconsistent, though. It never had a run of good eps like season three did.
I blame it on two things.
For starters, they seem to be unfocused nowadays. They used to surgically make a Curb-like nose dive into the plot and payoff. Now its like a shotgun. Last night for example - they were mocking The Secret and Extreme Home Makeover? Only one of those elements should have made it in. Everything is less coherent, more scatter shot.
Also, they're writing and producing another show at the same time. Considering that save for maybe Fred Savage, that there are no real creative forces on the show except the principles, I though that it was a bad idea when I heard it.
