Some time ago there was a post here about it. The guy claimed he and a few other fed up devs made that banner on their own initiative. The whole thing was a huge bluff because at the time google had no such plan but it gained so much momentum that they went ahead with it eventually.
That's awesome.
Having lived through the browser wars, this is my new favorite fact about the whole thing.
It really was a very different time, and you couldn't have convinced me back then that I would miss it one day.