I don't think my statement is "faulty" at all and to debate what "Linux" means misses the point. While Linux may be a generic term and there may be various "flavors" thereof, the comparison holds true. Linux variants as a whole are generally used by more advanced (technical type) users and so is Drupal.

Joomla and Wordpress are more mainstream as are Windows and Mac OS X. Granted, the vast difference in market share between Windows and Mac OS X does not hold true between Joomla and WordPress.

In the end, I was simply making an observation (apparently made in part by others) not based on small nuances in one specific OS but more on the overall end user experience of three leading Content Management Systems.