After the UM show in Tulsa week (which was one of the weakest shows I've attended), I realized that there are very few "songs" that I like, and that most (literally) of them sound so much alike, that I can't tell the difference between them. Most of them suck.
That said, when they get into improv territory, they're actually pretty talented (not to mention Jake is a pretty damn good guitarist).
The reason I go to moe., UM, etc shows is bc I dig improv. moe. is SO much more talented than UM though, imo.
But yeah, improv..... they're pretty good at it. They jam. That's my favorite thing about music.