Are USB wireless cards well supported on Debian?
I would say no (Ubuntu is a Debian variant). They aren't very well supported on Windows either in my experience. Maybe I shouldn't have bought a D-Link. The first thing most people do when they install Linux/buy a Mac is install a Windows Emulator / install Windows XP.
Then maybe they shouldn't have installed Linux/bought a Mac in the first place. I don't see how the ignorance of "most people" is somehow a testimonial to the greatness of Windows. See above comment.