I think the accusation of shilling isn't as easily dismissed as you seem to think.
Muller is notorious for taking anti-Google positions, and his anti-Google stance appears to be so extreme it affects his judgement.
Meanwhile, he is getting paid by Microsoft unknown amounts of money for unknown work - it's not just a single report. To quote:
He says that he and Microsoft have worked together more than once, but that because of a confidentiality agreement with the company, he can’t elaborate on the details of that relationship
http://paidcontent.org/article/419-is-patent-expertblogger-f...
A further quote from that article is interesting:
Mueller may have perfectly good reasons to consistently zing Android—he’s far from the only pundit that has consistently strong views about a particular company. But given his financial relationship with that company’s archenemy—and the fact that Microsoft has a history of “hiring” outside experts to attack the competition—it’s hard to regard him as a disinterested party. The time has come for Mueller to amend the conflict of interest disclaimer on his blog and for the media to cease citing him as an impartial authority.