My wife, who writes better headlines than I do, said most people wouldn’t understand my headline about Fiat. I wrote “Fiat plans for world domination: a sure thing“, thinking Davos Newbies readers would understand that the “sure thing” was failure, not success.
I think it’s generally true that Americans aren’t strong on irony, although there are certainly exceptions. The British, on the other hand, excel at irony. I spent 27 years in Britain. Some of that atmosphere wore off on me. So please pay attention.