I travelled from Dublin Airport last Saturday. Check in was very quick with the self-service system and tag and drop for the bags.
We got in the security queue, which had 6 'rows', at 4.40p.m. We emerged the other side, with shoes back on, exactly 20 minutes later. This was much quicker than we expected, having heard all the stories about 2 hour delays. The fact that our flight was not departing until 8.15p.m. meant a long wait, but at least we were through!!
My main complaint is that of the 8 security machines, only 4 were in use. Is this what slows things up? If so, why can't all 8 be used?
We came back from Heathrow on Monday evening and just walked straight up to the security check, no queues whatsoever.