Distrowatch does not measure which is the "Best Linux Distro. It keeps a measure of the number of page hits on Distrowatch.
The DistroWatch Page Hit Ranking statistics are a light-hearted way of measuring the popularity of Linux distributions and other free operating systems among the visitors of this website. They correlate neither to usage nor to quality and should not be used to measure the market share of distributions. They simply show the number of times a distribution page on DistroWatch.com was accessed each day, nothing more.
...being a Linux user myself since 84 ish.