Only the lower dungeons have had the 30 min plus consintently on the Aether server for DPS, and the fact that it was consitent even with the lull between major patch and xpac says a good bit about how it was spread at the time actually. As of now with both AST and especially DRK added que times seem to be a bit shorter, and end game DPS has usually been closer to 15-20 minutes prior to HW, a little shorter now.

Only seen a que take over 35 minutes in A.) PvP, and B.) This one really wierd time where a mostly preformed group for WoD I was in had to wait 3 hours...we still aren't sure what happened with that one.