If you note his sig, Unix geek, he's implying that Windows is just a "kids" program. If you need something powerfuul obvious according to him, yuo'd use Unix. Unix is a fery powerful program, that is rather on the complicated side, so is only used by geeks like him.
It's sort of in the same boat as Mac's. Everyone says how great they atre, but no one uses them anymore as they prefer popular priced, mainstream solutions!