This article is BS. The author minimizes the Vista issues and makes mountains out of mole hills with the MAC.
This is nothing more than an attention getter backed up by little fact and a lot of opinion.
This article is factually inaccurate. The “incompatible programs” that won’t open are a list of 7 programs that Apple warned you about before purchasing. http://support.apple.com/kb/HT3258
Also, they warned you months before release that PowerPC support would not be included in SL. It’s still being supported with Leopard, however. They are continuing to make new versions of that.
As for speed I’m not really sure. I wasn’t going to buy SL because of the base 10 file size reporting. However, someone figured out how to change all that so I went out and bought it. I haven’t gone full linux because I do iphone development.