API GetBattlefieldTimeWaited

timeInQueue = GetBattlefieldTimeWaited( battlegroundQueuePosition );

Get time this player's been in the queue in milliseconds

Arguments

 * battlegroundQueuePosition : Integer - The queue position.

Returns

 * timeInQueue : Integer - Milliseconds this player has been waiting in the queue

Example
You queue up for Arathi Basin and Alterac Valley.

x = GetBattlefieldTimeWaited(1); # Arathi Basin

y = GetBattlefieldTimeWaited(2); # Alterac Valley

As soon as the join message appears, that slot is "empty" (returns 0) but they are not reordered, queuing up again will use the lowest slot available.