My guild managed to scrape a raid together this week to down not only Stone Guard, but Feng as well, with the help of 2 PuGs.
And I do mean help, because not only did they endure numerous wipes and (embarrassingly) out-DPS most of our raid - by a fairly wide margin, I might add - but they also helped to lay out strats for Feng since we hadn't looked at him previously.
I was incredibly relieved that with my newly-acquired 4pc the PuG warlock with 6 blues didn't show me up (that wouldn't just have been embarrassing on a personal level... it'd be horrifying!), but it does highlight a bigger concern that as a guild we may not have enough oomph.
With the advent of LFR and the casual raider, I feel that a tendency to be lazy has arisen - stand in fire in LFR and you probably won't die; neither will you be punished for low DPS.
Maybe it's time we all went back to raid training camp to re-learn how2play - I've made a lot more mistakes myself this expansion than I ever did in previous ones!