I really enjoyed the book, and the info about open plan offices was really interesting. I was previously a fan of the open plan, but now I think if I ever design another office, it would be common areas and offices that close.
Being able to shut your door for a few hours to crank stuff out is incredibly important. Being able to walk a few feet and collaborate is also incredibly important. They're not at odds.
It doesn't take rocket science to design a space that works. It takes something harder: Money, and the ability for non-engineers to listen to people who haven't been drinking the latest silver bullet kool-aid.
"People can't concentrate in noisy environments." How hard is that to get?
The music vs silence point, for example, is based on a tiny experiment with a small sample size. The kind of conclusions that are drawn from it in the book are a stretch.