I notice that the author of this piece is responding _only_ to those who have been trollish, rather than those who raise good points. This is interesting. I suspect the topic and material were picked so as to provide for those comments, thus allowing some that the author could respond to without having to actually defend his position.
A bit of research (simply looking at the jargon file) reveals that 'fortune' originates from WAITS, an OS related to TOPS-10. I should hardly think that this means that the presence of 'fortune' can be taken as evidence to whether a system is UNIX or not.
My debian system does not have fortune installed on it, and I never did anything in particular to keep it from being installed.
IIS free with NT server
True, IIS is free with NT server, but when's the last time you looked at the price for NT server? Not only that, if you want to run more than one server, you need site licenses, which significantly add to the price.