I'll have to look into the media query support by mobile browsers further, but his reference is 2 years old at this point, so it's not clear to me if his source is accurate at this point in time.
Either way, the issues seem mainly technical and if that's the case, we'll work around that eventually. The philosophy of web design at the heart of the book is what is key I think. We should be thinking about how to build an experience for mobile, tablet and desktop from the start and wireframes should incorporate content choreography (http://trentwalton.com/2011/07/14/content-choreography/) and the design and prototyping process should become more iterative.
I don't agree with the brian fling quote he drops into his article, I think that for the most part that statement reflects the prevailing thought on mobile UX from when the book was written (2009). It's a very rare thing to find a mobile site today that lives up to our experience expectations from a web site.
Anyway, this is a great counterpoint and I'll definitely be sharing this around the office.
Granted this place isn't finished yet, but I have no idea how I'd find specific posts again other than bookmarking them now. So if I were to stumble upon someone's Google+ blog 3 months from now, I suspect it would be difficult to explore in any non-linear sort of fashion.
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