Surely this must be a different Boeing to the one that reacted to Airbus' launch of the A380 with such scepticism and announced that according to their figures there was no foreseeable market for such large passanger carrying craft.
What is more likely is that their R&D dept. have been knocking round a few ideas and someone has seen some of them and assumed they are being developed. In fact some of Boeing's blended wing-body ideas have been in the public domain for some time.
Until this article there was no sign of these ideas actually being developed. See thread in Tech Log:
http://www.pprune.org/ubb/NonCGI/For...ML/001650.html
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JJC