Not only did Blizzard continuously communicate about full server, they continued to add them as they filled up. You also had the option to login to classic and see the full servers for yourself for quite awhile. At that time you had the ability to also choose the name of your choice on another server.
All this before the game was released. You now have the option to roll on a low pop server, or just wait until things die down and the queues go away.
I would much rather face a queue now than face a dead server in a month when things calm down.