The primary source being cited by most of the articles is U.S. Gov Analytics, (or the less reliable Statcounter, which I wouldn't rely on.) U.S. Gov Analytics currently places it at around 4.7% over the last 30 days, 4.4% this calendar year, and 5.6% the last calendar year. It was about 6%-ish when most articles were written about the 6% number for the first time.

Steam, so basically just gamers and not regular desktop users, has it more around 2.3%.