Certainly not for an "average" game, and I said it's not that great for a WiAB quality game. I mean, an average game rated 3 or lower usually makes me want to puke.
But it's complicated, I would say that it's not a uniform but a logarithmic distribution. That is, about 500 games with a rating higher than 4 are what I would call above average and 5000 games with a rating from 3 to 4.5 are what I would call average. Well, the rest of the 20000+, just tell me yourself what is it.
So I'm talking about the "above average" category, where WiAB isn't even in the top 300 because there's not a single game rated 4.2 or lower. It's on page 15, my settings are 30 items per page, so it's somewhere around 450th in the weighted rankings. SG is right there with WiAB, by the way. Can you really name 300+ AVN better than SG? I can't. So yeah, WiAB and SG are far from "overwhelmingly positive" to me.