@Snuzzle:
While I did manage to beat LK while it was still current content after over a month of nothing but wipes, my tolerance for wipes in PUGs is very low. Though I won't leave an ongoing PUG due to just wipes, getting a couple bad PUGs in a row can make me stop PUGging altogether for a time - and getting almost a month straight of bad PUGs, together with my old raid group disintegrating, is what drove me to leave the game back in January.

BTW: with the LFR in place to take a look at the raids, if I do get back to WoW, I most likely won't even attempt the normal or hard modes. For me, the effort to find a good group - or the frustration of wiping with a PUG - is just not worth it. Plus, being able to play without scheduling it in advance is, for me, a REALLY HUGE improvement. Also, I like the idea of having the looting system locked into a "need before greed" mode, which should eliminate the worst cases of ninja looting in PUGs (although I would really prefer individual loot, either in the form of loot bags, or as just tokens/points).