I just purchased World of Warcraft, it came with four 7.8GB DVDs, and after using Disc 1 and allowing it to install battle.net, it appears battle.net is installing WoW from the internet. I've tried disconnecting the internet, and battlenet won't run or install anything further. I've tried running the installer from disc one again and it simply restarts battlenet which starts downloading indices from the internet. If I remove the disc during this process it doesn't complain, and Task Manager shows that it's not accessing the disc at all.

I don't want to download all 30+GB through my slow connection. Will it eventually start pulling from the discs, or is there some way to let it know that I have them?