This whole rank it mentality people have is stupid in the first place
The beauty of a niche genre like Jam is that there are so few great bands in it. They all have a distinct sound and so a person like myself who loves the Grateful Dead may not care a whole lot for Phish. And I don't.
And I have seen them live. I had a good time, I've seen Trey play with Phil Lesh 3 times, seen him and Mike Gordon tour together, seen him play with the Trey Anastasio Band. I just don't fawn over their music.
I lived in the Northeast for all of high school and I know what their fans are like. They are either preppy folks who smoke weed or are dreadlocked stinkers, not much inbetween. They do have an elitist mentality most of the time. If you compare a band to them it is like telling them their child is ugly.
When I moved down here from Connecticut none of my friends listened to the Grateful Dead. I played it for them, they don't like it. I still play it on my own, but I don't yell at people who don't like them.