I have never been in a group where a tank who says, "first time in here any tips" was treated poorly. Quite the opposite in fact. We will go with the single pulls if needed, give advice, call out anything major to avoid etc...It is in all of our best interests to get more quality tanks at max level. We often after a few pulls coax the tank to pull two groups, hold off until the tank is situated and then let lose with dps. Nothing helps a tank pull big than seeing how fast and fun it can be.