From the Slashdot article:

It's not Windows. It's not distro wars. Sometimes it's just the arrogant attitude that keeps people from switching from Windows. 'As I spoke to newbies, one Windows user who wanted to learn about Linux shared the encouraging and constructive note (not) he received from one of the project members. The responding note read: "Hi jackass, RTFM and stop wasting our time trying to help you children learn."

As they say in the World of Warcraft forums: QFT (Quoted for Truth)

Mac is also the same way. There are few Mac users I know who aren't all high and mighty and "holier-than-thou", so to speak, in how they discuss such things with you. Ya'know what? I really don't care if you think that, but don't go blasting it all in our faces or we'll just keep on ignoring Apple and keep using "horrible Windoze".

Everyone approaches us Windows users with "you HAVE to be use this because it IS the best"... you should approach us with "you really oughta try this because it's better at this". Not that saying that will work, either, mind ya'... but it sure is better than going "haha, you use Windows noob. You need to use OS X, it's way better than the trash you're using".

It's not just that Windows people are stuck up and WON'T change... nobody will change unless there's a good reason to, and even then, nobody will change if there's not going to be any help. It's just good manners not to be snobby and elite... and it's just plain ol' idiotic to be snobby and elite when you want people to USE your stuff.