I joined Blazedarkbringer's PUGs a short while ago based on the recommendations in the previous PUG group thread. A couple days later I got 21(!) Steam notifications filled with this:
mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598 mumble-us.cleanvoice.ru port 52598
Aside from this shitty announcement spam, it took probably 20-30 minutes to get the PUG started, and that's only counting after there were 12+ players in mumble and the server. The PUG itself was pretty decent, with most players being around low-mid Open level as expected, although there were definitely some UGC caliber players. I played a couple maps and left, and I haven't been back.
As for PUG groups that I do recommend, there's always Party PUGs, which actually work quickly in a sensible manner and have a solid base of low-mid Open players and the occasional IM+ players. GoodGaming PUGs are practically the same and even share some of the same core players. Note that they both have certain restrictions on off-classing.
(In the middle of writing this post, Blazedarkbringer's PUGs spammed 5 identical announcements:
ANY O YALL WANNA GET DESE DANK PUGS?
173.208.211.220:64738
173.208.211.220:64738
173.208.211.220:64738
173.208.211.220:64738
173.208.211.220:64738
memes)