Well, on Chaos (Europe), I wait just like 10-20min for Feast as Melee DPS between 17h (roulette reset) and 1a.m. (sometimes until 2a.m, but depends on people I guess).
Sometimes it's even less or instant.

I'm worried about such topics stoping people from even trying to queue because they could be afraid it could be the same 24h/24. Thx there are our servers written beside, but please think that we don't all know if your servers are from NA, JP or EU by heart.