I'm not sure what it is, but there's something wrong. I, personally, am suspicious that it's probably a bug, because it's a problem I've found is not exclusive to pvp.
Most people don't realize, because most people play as dps, and que times for dps are crap anyway. I play as a tank, and I can tell you, with CERTAINTY, that the DF gets gummed up. I've waited in a "less than 5 minute que" for 25 minutes, only to have the que pop instantly when I refreshed my que time. It's happened a few times. It's almost like the game is searching for a active duty, but not actually searching. You refresh, and it wakes up suddenly, going "oh, right, you wanted to play."