Chris Howard said: "However, why aren’t those install base figures for desktop Linux reflected in these internet access figures?"
Many Linux users set their user agent in the browser (e.g., using the "User Agent Switcher" extension) to Windows/IE, so that they can access poorly written web sites. This is the standard workaround given to new users when they report a problem with a web site. I have to do it myself on many sites. Rather than switch back and forth, most people just leave it set.
The article says "Not that market share accurately reflects the actual install base" and "the cold truth is Linux on the desktop is still barely worth mentioning".
I detect a bit of bias. Installed based numbers indicate that Linux actually surpassed the Mac installed base (actual number of desktop systems in use) in 2004. The current Linux installed base is between 6% and 10% depending on the source of the numbers.
In the case of both the Mac and Linux, the conversion is from Windows. As a result, the Windows installed base has dropped to 82% to 86%.
Remember that "market share" reflects only the number of units sold - which does not apply (for the most part) to the Linux market. Most Linux "sales" are not sales of the software, but rather support contracts. As a result, only installed base matters when comparing anything to Linux.
Apple is Killing Linux on the Desktop
Apple is Killing Linux on the Desktop
Apple is Killing Linux on the Desktop