As dps no matter the time, it's almost instant pop. At peak times obviously, but I've queued at literally any possible time last week, including middle of the night (3, 4 am) or in the morning before maintenance, and it still never took more than 5 min.

When I tried queueing as a healer, still no pop after 30 minutes.
The tanks I know don't even try it anymore, they just go to pf and form the party there straight away because that will be faster than trying to enter through df.

It doesn't mean anything is broken, it's just the same "problem" all over again thatwe have had every single 24 man raid so far - while there are a lot more dps players than tank players, the number is closer to tanks making up only 1/3. But the number in raid is 3 vs 15 spots, so a lot more tank players than actual spots are fighting over who gets in.