I get that. I am probably the most cross-platform person out there. This is posted with Linux, I use Mac OS at work, have a Win7 laptop and a couple IOS phones.
No matter what, the code bases are starting to drift together. Linux, Mac OSX and IOS share so much and even Windows has more in common than Microsoft wants to admit.
Any vulnerability is going to propagate.
Windows uses a simpler NTP system even though it uses the same packet information, but it isn't as robust as the UNIX/Linux system. . . so, strangely, it isn't vulnerable to THIS problem, this time. If i recall correctly, it had similar problems several years ago, though.