Two things:

1 - What is your language setting in duty finder? If you're an a NA server queuing German only at 3am Germany time, you're probably going to wait a while. If you queue up all languages and get initially paired with someone doing that, you're both going to be waiting for a while.

2 - A new feature with HW was the people that haven't completed get shot up in the queue. This means if you have already beaten the thing, everyone that hasn't gets put in front of you in line.