Basically the title, not sure if its still high pop
For alliance it’s fine. Horde is a bit rough.
If you look up online it says Dalaran is a high population server with 60% Alliance and 40% Horde. IMHO feels more like about 70-30 or even 75-25 Alliance to Horde. Nothing like trying to kill this or gather that and 4 Horde players are competing with 10-12 Alliance for resources.