To stick out his tongue would only be too human. And juvenile. And to detract from important matters at hand.

So it's just heavily implied in the second or two before he launches directly into the current problem.

"Do you hear anything of the goings on in the Garrison? Are you privy to any sort of information?"

He does not know of any higher ranking angels who might be helping Anna. But then, when has he ever really known his sister?