1 Because you are a twink. Twinks have xp turned off, either willingly such as a paid account at level 29 or a F2P account, capped at level 20 by blizzard. XP off players are queued separately, so your twink will not be face rolling some player that is leveling via bgs. Now, since there are a lot fewer twinks than there are regular, leveling, players, the queues are longer. The shortest queues are in the 20-29 bracket, because this is where the F2P players are put. F2P counts as xp off bracket at level 20.
And as mentioned, time of day, server pop and number of people playing at a give time also affect queue times.