EU here ... voted less than 15%
I did 10 random heroic dungeons with my alt gearing up the last week:
8 times: Fluid, great CC, no big mistakes, 0 - 1 wipe max, but low dps (~10k each)
1 time: See above, but great dps
1 time: The group was a complete desaster, we hardly managed to kill the 1st boss in DM, disband afterwards