Lots of empty zones. Only places with people are PoKnowledge, guild lobby, newest expansion, the expansion just before that and some "hotzones" (random set of zones SOE chooses to recieve bonus exp. for leveling). If you are not already high level, Norrath is a ghost town. General channel usually have around 180 people on my server and occasionally will go over 200, which makes a General channel 2. Seen it as high as 100 people on general 2, so would assume still around 300+ people on my server at times. I am in a guild and honestly, if it wasn't for that, I'd have stopped playing EQ long ago. My guild makes EQ seem like other people actually play it. But it is nothing like it was before in 1999 when I started and everywhere I looked, there was a player running around doing something...although virtual game world size, EQ has probably grown 10x since 1999, so much much much bigger game world.
Although when I go to a camp I want and someone is already there, I think there are too many people playing EQ.