I'm a 950 tank and i usually get into groups easily enough. I only do the +15 (previously +10) for the weekly chest, i got low wowprogress score and i have no interest in working to make it higher. I got 7 days to find the 2-3 dungeons i prefer to run at this high keys (EoA, NL and DH) and so far it's never failed. It'd be lot harder for me as a DPS and seeing how terrible some people can be in these runs and how one person in the group so often has no idea what they're doing, the demand set on people at this level of the patch are perfectly reasonable. I set them this high when i run my own keys (if i get a favourable dungeon that week :P) and i rely on other people setting the same standard so i have a better chance of joining a quality pug