Christian, I've been reading your site for ages, but I'm still stunned by the amount of effort, insight, and sheer usefulness you've put into this review. After reading so many offhand critiques of this score, it was an enormous pleasure to finally encounter your review. As far as I'm concerned, it is a definitive word on Mr. Arnold's work on Quantum of Solace.
I'd be less harsh toward the Jack White song -- I find it fits the tone of the Craig era, this particular film and the current musical landscape quite well, and Arnold's incorporation of its elements in the score works very well. It's also a pretty bold departure from the Barryesque title songs that this series might have repeated with diminishing returns for who knows how long. Still -- this is just a difference of the opinion, and I do find your arguments very valid, here as elsewhere.
For now, I'll hold this review as a gold standard of writing about film scoring for this entire year. Bravo!