Queue times for DPS roles have been declining steadily since the patch and it never takes me more than 20 minutes to get into a run these days (often it's less than 10 minutes). Wether Roulette or regular queue. Maybe i'm just lucky but I think that what SE said was the truth, since the patch a lot of people have begun to play tanks and now those tanks are getting into endgame.
And making dungeons worth the time spent inside them was the best thing they could have ever done.