They are being hypocritical by saying that Apple and Msft bid many more times than what those patents are really worth, when Google itself bid upto 4 billion dollars. And what gaurantee does Google provide that they wouldn't sue competitors aggressively? Dont tell me its because their 'motto' is Dont be evil.
The difference is that even if Google were to try to use those patents offensively against Apple and Microsoft, they probably wouldn't have much of an impact- Google's motivation was defensive, and they pretty much had to try for those patents.
On the other hand, Apple and Microsoft are /already/ having an impact on Android and these patents would only strengthen them- their motivation was offensive and they were the ones who inflated the prices just to hurt Google.