The downloader took 12 minutes from the office. It took 9 minutes from home. It basically optimizes for the fastest download possible.
Gamershell offers many options to download from various parts of the US and Europe if location causes a problem. Spawnpoint takes about 15 minutes to download.
There are several other download options available, but many of them have not updated our client. We'll be getting a new client build after we release the Caelum and Auction House updates and revisit the download mirrors.
spooty spooty spoot-head! -Norbert & Daggett