"Articles about Linux and mainstream Linux news tends to be dominated by the big Linux distributions, those with large corporate backing and/or large development teams. I'm primarily talking about Red Hat Enterprise Linux and it's free clone CentOS, Novell/SuSe, and Ubuntu on enterprise servers and Ubuntu, Fedora, Linspire, and Mandriva on the desktop. Throw in two venerable and widely respected distributions, Debian and Slackware, and you've got about 90% of the industry chatter covered, maybe more.
"These distributions also have something else in common: with the exception of Linspire/Freespire, which I haven't tried, they have all frustrated me on one level or another..."