[transcriptase]

“ — “ is the giveaway.

[wyclif]

Not really, as pointed out by others in the thread. Anecdotal of course, but I use em dashes all the time— even in emails and texts (not just long-form writing).

[mwigdahl]

Same, and it's disturbing that this is going to be picked up on as a bogus "tell" that my writing isn't my own.