I had a look at that too. I'm not sure what dbases are loaded but I hadn't actually expected that all the proponents would be masters deespite the title. Buyer beware indeed if you slavishly follow the stats w/o looking at the games and players...but if that's what you use it for you deserve what you get imo.
I realise that wasn't your point likes forests, just something I've noticed abt a lot odf people in the vote games who just go by the stats on XXXwebsite.com etc.
On the other hand in support of your point a friend noted that there were games by 1300 rated players , so it isn't quite what it says on the tin as the saying goes....
The Game Explorer 'Master Games' option displays many games that are not master-level. This could give people false impressions about various opening lines. For example, see the thread, "Game Explorer reveals strong uncommon openings?" where it was believed that 90% of masters fell victim to 1.Na3 (whereas against masters it only seems to score 8%).
I wonder if there's a better word to describe what the database contains?
For example, under 1.Na3 see Guk-Jadenkus, Vilnius 2000. FIDE has records on both players and according to them neither player is a master.
Also when you click on 1.Na3 it shows four Internet games from Bill Wall... which then disappear when you click on 'view all games from current position'.