Your constant claims that Linux is standard or consistent in any way are hilarious. Here's a more realistic description of the state of the Linux chaos as it exists today, from an article right on Linux.com:
http://enterprise.linux.com/article.pl?sid=05/03/01/2248250
"every distribution of Linux sucks in its own special way. Some just suck less. However, eventually, no matter what distribution you use, something about it will drive you insane, and you'll try another distro to see if it's any better. What you'll then realize is that, while it may handle what drove you crazy before much better, it handles something else in a way that drives you even more crazy."
LOL
Whats different is this: there is no documented ansi standard on where the passwd file should go. There is one for SQL syntax.. MS decided to break ANSI compliance..