Let's just say their Matching system sucks donkey. I refuse to believe there is only 1 person who needs the dungeon (watches the intro) while the rest are max lvl players.
The roulette is not a roulette when you get the same dungeons 90% of the time.

I absolutely refuse to do WOD and lvl 80 raids (they are 40min- 1 hr long on average) I rather take 30 mins penalty and do something better with my time.