Running the windows installer downloads the current dmd.version.zip from ftp.digitalmars.com. This takes about 5 minutes (150-200 kb/s and ~30MB).
The windows installer should also obtain the dmd.zip file from the amazonaws as linked in http://dlang.org/download.html.
Furthermore all the installers should be hosted on a CDN too.
Comment #1 by eco — 2013-05-10T14:36:35Z
I'd assign to Walter because he's the only one that can do this. The URL is changed in the NSIS script right before he creates a release.