Top 5 Distros... (Score 3)

I'm curious how they decided which five were top. Maybe my personal experience isn't indicitave of the general population, but I've personally met many more people running Debian than TurboLinux. Are they selecting based on the size of the corporation that owns that distro? Number of copies in use (and if so, how do they measure)? File size? It seems to me that most of their choices for "top distro" are the ones that have been in the mainstream news lately (Caldera, Corel) rather than the ones that are most popular or best suited for the jobs they selected.