When Jacqui drives me around in Australia, I narrate what texts she’s received and write the responses for her.
Her brother wrote “Sure!” So I said, “Sure exclamation point”
Then she asked, “Is ‘exclamation point’ an American thing or Matt thing? I would say exclamation mark”
I used to be quite sure about whether something was an American phrase or words I had made up, but you know how it is.. if people ask you, you start second guessing yourself.
So I looked it up:
http://en.wikipedia.org/wiki/Exclamation_mark
which is always a wealth of information, but a second page
https://www.englishclub.com/writing/punctuation-exclamation-mark.htm
actually lists that “exclamation point” is American english.
It’s always fun to learn new things!