I was on Dalaran PvE, one of the oldest and largest servers. It was also Alliance dominated, so there were very long BG queues (45m-1h 15m WSG, and 1h 30m AB queues).
I went to Rank 10 while being a full-time student, full-time progression raider, and doing everything wrong for actually accumulating honor (which I learned much later in the expansion). Mind you, I still had to farm my repairs, enchants, consumables, and twinks.