Its a great start, with some good points. I'd have liked to see a little more emphasis on the figures and needs for multi-screen. I know it was there, but it was very minimal. Many businesses that own websites don't 'live' online to the extent that SEOs (and Google staff) do. It takes longer, and more evidence, for them to truly get it.
I also think a lot of the information from Google lately has been overly positive about responsive design. The truth in the real world is that the majority of sites, certainly ecommerce sites and wordpress sites, are generally massively over-bloated with scripts and CSS that offer very little value to the genuine mobile customer.
Responsive design typically merely styles and sizes the same content for all in most cases, forcing mobile users, (who usually pay for data transfer, and have the least screen real estate to enjoy effects) to download scripts and assets that make little or no difference to them, and slow the mobile experience compared to a dedicated, stripped-down mobile experience designed for speed and utility.
Whilst the paper does mention this in the section about a strength for dynamic serving, it should also mention this clearly as a common weakness in responsive design. At a time when Google, (and you personally) have been stating over and over how important speed is for a mobile experience, its a major ommission not to include that vital aspect in the white paper.