I don't think it was v4, but that was the final slap in the face. Basically there was so little progress from 2006 (v3 was released in June 2006) to August 2010

I don't think it was v4, but that was the final slap in the face. Basically there was so little progress from 2006 (v3 was released in June 2006) to August 2010 that whatever they did had to be world-shattering. And it was the opposite.