Geeze, I feel out numbered here. I use Linux as my main OS and rarely switch back over to Windows, though I do have it installed. Even though I'm a pretty big gamer, all of my games are WINE compatible and I get better FPS with it anyways, so I have no reason to go back unless something goes screwy.
Anyways, OP, it really depends. Most people are already extremely familiar with Windows, so really, unless you're reading a book, I don't see how you can become more familiar. And if you're reading a book, you can do that just as well on Linux. So IMHO, it comes down to which you like better. If you like one more than the other, go with it, just be prepared to justify your claim, as to avoid the rampant OS snobbish-ness.
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning. -Rick Cook