It seems reasonable for people speaking on behalf of a project to identify themselves as speaking on its behalf. The question has turned up three different people not divulging that information so far, so I think it's done the job.
We're not speaking on behalf of WebKit, merely as members of the team explaining the team's approach. Neither are we trying to hide as "not divulging" implies.
I wasn't implying deception, but if "we" means "the WebKit team" that would seem to be speaking on behalf of the WebKit team. The clarification was useful, that's all.