If you could come across as any more abrasive, I'd give ya a medal. No, seriously, I think I come across as abrasive, but you outdid me here. Clearly you haven't read the pages and pages of vehement disdain for Apple from many long-time Apple users. So not only is your post the scribblings of an antagonised moron, it's also misinformed.
To the point:
Sure, Vista had it first, but OS X's kernel is kept COMPLETELY separate from any third party developers, so in actual fact Vista's iteration is a total waste of time, hence why they openly allow you to turn it off - that's not brains, that's deflecting possible blame. Vista had it first, but Leopard was the first to actually put it to any use. Besides which, given the amount of features that both parties have 'borrowed' from each other, who is counting any more?
Oh, and with regard to showing file extensions -
http://www.fileinfo.net/help/mac-show-extensions.html. Oddly enough, Windows doesn't show file extensions without being set to do it.
Where's my kool-aid?