Not really. UGLs use untested raws and many of them don't produce their goods in a halfway sterile environment.
Therefore, they can be shit right out of the gate.
Established UGLs on the other hand, yes.
Some get too big, too fast and fizzle out because they get greedy.
Sadly though, unless you're willing to be a test monkey and take one for the team, you'll never know if thier first few batches were their best until others have tried them out and post positive results, thus making them established.
All in all, it's a crap shoot.
The way i see it, find a good one, ride it till it fall's apart.