In the same article, they acknowledge there are improvements to be made in the testing methodology, and the changes noted would - in my opinion - help FreeSync. But as a general test, it's probably fairly accurate for the current state of FreeSync and G-Sync. FreeSync is still new tech and there are improvements to be made, G-Sync is more matured and currently offers the better experience. The question then becomes is it £150 better experience?