I'm on Chaos and I can't say that I've had any issues with any queues popping from duty finder whilst playing tank.
They're always more or less instant.

I do work a normal 9-5 job, so I'm logging on in the evening during "peak" hours.

CC also never takes long to pop, not to the extent of what you have seen however, Sindriiis.

The raid scene on Chaos is terrible, but for that, if I want to raid I go to Light.