said by xenophon:Google has nothing to lose and everything to gain by helping Sprint/Clear speed up their LTE rollout. 4 strong LTE players equals more device usage and more ad revenue for Google.
If the last referenced article is right, it will be LTE on Clearwire and Google devices simply use them. Nothing too experimental about that. CLWR already plans to go to LTE anyway. If anything, this may help push Clear to LTE faster and best case is that Google helps fund.
Now if Google is planning some new protocol, that would be experimental, but doesn't make much sense.