I found this mentioned over at BoingBoing.The Operating System Sucks-Rules-O-Meter is a chart based on periodic AltaVista searches looking for the name of each OS followed by the terms "sucks" or "rules." So, if AltaVista checks TUAW and sees that I say that Windows XP sucks, there will be one more result on the red side of the line for Windows XP, and when they see that I say that Macintosh OS X rules, there will be one more result on the green side of the line for OS X.
Right now, Windows sucks the most (big surprise) and Linux rules the most (although Linux also comes in second place in sucking). Mac is split into Mac OS and Mac OS X with 419:152 and 2448:524 rules to suck ratios for each respectively.
This is cool, but what I would really like to see is a version of this that used Google, Yahoo!, and AltaVista (and whatever other search engines you'd want to shove in there), and averaged these responses out according to market-share. I suspect that OS X would be the clear leader under such circumstances.