Of course he is, but there's no denying the flat out facts that they used this mailing list to coordinate how to respond to these things unified
I'd deny it, tbh, because a longer excerpt I've seen from that google group showed someone asking why it was ok to report on josh mattingly and whoever else, and not ok to report on Zoe Quinn's sex life. When various others were hotly responding they are entirely different things (for ex., alleged affairs are not the same as sexual harassment) the other guy was coming back and saying "whoa, hold your horses, I'm not saying they're the same, or supporting the idea you should cover both, just making the comparison because people will ask and I want to know your position on it."
So in the bit I saw, in an article strongly stating there was collusion, was an example (in still, a very reduced snippit of exchanges within that group) of disagreement and debate. Which undermines the idea of collusion itself, to me, ironically. Or that the group is being used as a front to force ideology or agendas on an unwilling public, rather than just discussing the issues among your peers.
I.e in an article where you're producing excerpts as proof of collusion, to my mind, it undermines your argument somewhat if there's debate/disagreement within that small bit you're quoting...
Found the article in question:
http://www.brightsideofnews.com/2014/09/19/inside-the-secret-world-of-games-journalism/