Uh, no. Truth is, the Linux loaded machines typically come with a crappy sized hard drive, while the Windows loaded ones come with a big nice HD. Ya gotta buy the Windows model to get the better hardware. So one must pay the Windows tax, THEN download their linux of choice. Or get stuck with the crappy hard drive.
That's now, not originally. Initially, they all came with Linux. Here's an example:
First Atom-based notebook runs Linux
Now, based on articles like the parent Linux is being reduced from even being an option. Which is great as far as I'm concerned, as "utopian software welfare for the world" isn't something I'm interested in from a political standpoint.
Linux Netbooks have a return rate that is 4x higher than XP netbooks. That simply goes beyond hard drive size, that means people saw it, purchased and decided they prefer XP over Linux.