Really? For me Linux takes days. Longer than Windows. Given that it's much more customizable than the other two I spend a lot of time setting up everything how I want.
You can tweak it for years if you want, but that doesn't mean you can't start working after a couple minutes. The point is a Windows box takes a full day to set up. You can somehow reduce that by slipstreaming SPs and fixes into the install disk, but keeping track of them and merging them into an install disk is a career in itself (one I would chose crime over)
