Not sure I agree with your analysis of the situation. W3C TAG, for example, was perceived as a stodgy, out of touch standards body. Yehuda led the charge to reform it and bring it back into the realm of practitioners.

In this case, I think you've got the causality mixed up. Projects often gain prominence thanks to the work Yehuda puts into them, as he's particularly good at articulating their strengths to a wider audience. It's not that he's bandwagon hopping—it's that he's helping to create the bandwagon. ;)