Cenarius (Alliance/US) is still very populated, any time of day.
It's the 11th most populated server (more so than any of the big boxing servers) with 80% alliance on the server.

We get the Chuck Norris things, and Anal links in trade pretty constantly.
An auctioneer auction scan takes 20-35 minutes.

Conversely, battlegrounds pop in 90 seconds if you queue AV, when its not AV weekend.
The weekend battleground or random, are close enough to instant pop.
Fives queue's are under 5 minutes, at primetime or on weekends.
Twos queue's are under 2 minute at primetime or on weekends.