I took some more data.
There’s a total of 3246 players on Blackrock and 3340 on Warsong. Both without queues. Maybe they relaxed the server cap a bit. (EDIT: I tested a few hours later when there was a small queue of 20 people on Warsong and the total population was 3350, so this is still the cap. People complained a lot about the lag.)

To see what I gathered follow the “read more” link on the right.