I understand your fear, I had it too. But actually, I was proven wrong, to my delight.
I finally reached the Pretor (final dungeon). My virgin run.
During a cut scene, where I was enjoying some story, I got left behind. I cam out of the CS to be alone; no blue dots in sight. I paniced. But, literally, within 5 seconds chat appeared
PlayerA: Missing one?
Me: Yes, sorry, first time. I'm lost now, cant see you
Player?: np. where are you?
I explain, they explain, sprint...reach them. They waited.
OK, so maybe only 2 or 3 cared (luckily one was main tank), and the rest had to bide time with me....but I never got abuse and actually it reminded me that there are more people out there willing to help than those who don't.

I examined, and there were plenty obviously just running for DR or Tomes....there was me, a few bits of DL and some crappy old wand.... But they were cool, and I had an awesome time