His grin keeps up as Sam admits to having to have at least some thanks for him. He waves a dismissive hand, because actual thanks can come later, well a later than involves Tony actually being able to see those wings up close.

"Well, you could have broken in sooner. But, well you still didn't know you could then. And I didn't know you, which would have made things awkward. If we ever get out of this, though. Feel free."

If Sam was someone Steve could trust enough to help him out like that, then really Sam was someone Tony should probably keep an eye on. It's always good to know which people to trust and Tony was quietly confident of anyone on Steve's list.