I get so tired of this close minded reasoning. If Windows was not installed by the OEM's and if all computers were sold without an OS you can say the exact same thing for all Windows flavours.
My personal experience is, that I found Linux very easy to install and had no problems with driver issues. After supplying a password it was connected to the net via my pocket wifi. I am not some whizz-bang nerd kid, I'm an old grandfather.
I found connecting XP laptop to the wifi a real problem, I gave up.