I joined an Ulduar 25man PuG today to try and get my Glory of the Ulduar Raider Achievement.
Usually these PuGs are terrible - someone stuffs up an Achievement, people get annoyed and leave, the raid breaks up at the later bosses, people roll need on everything...
Although this raid had a rogue that rolled need on quite a few items ("for repairs" - as if the rest of us didn't have the same repair bill) - the rest of the run was actually not bad.
Mimiron was where everyone really impressed me; the raid leader had stuck a symbol on his head and told everyone at specific points in the fight to stand together and everyone did - some guild raids I've been in haven't had such a tightly formed pack.
Vezax took a couple of wipes, but Yogg 1 Light was a one-shot, even with people entering portals that hadn't seen the fight at all. Algalon was a one-shot too, even with me spending half the time taking screenshots.
...and I am now the proud owner of another Proto-drake. Woo!