Certainly not true in my case.
I think windows, especially after XP, is a total POS. Linux desktop blows it away in terms of speed, security, reliability, and everything else.
Although I hardly use it anymore, I constantly have to muck with win7 on my laptop. Badly behaved apps put crap in my start up - making the boot time even slower. Every time I boot up, or shut down, I have to wait for updates. Sound stopped working for no apparent reason, had to fix something in the registry. On and on, one thing after another.
Linux just works, and work well. After using windows, linux is like a breath of fresh air.