As a recent arrival to the 70 dungeons, I leave this up to the healer. By default, I do small pulls unless the healer says they want more. Sorry, folks, but this isn't HW where everyone is drastically over-geared and big pulls are the gold standard.
Given that the content is a week old (less if you consider the roadblocks people had to get through), I imagine a lot of people are still adapting to the new skills and class amendments that were made. I for one have noticed that CD management is more important than ever on pld. Perhaps this will be less an issue when ilvl increases, but I am getting a little annoyed by dps saying (not asking mind you) "do bigger pullz."
I wanted to get a general consensus from the tanking community as to what they are doing. I want to say that I am asking this question from the position of someone who has played tanks almost exclusively since the game launched...so I know how to do large trash pulls.
I appreciate any input.