I'd imagine you reveal too much information with your personal latex writing style.
This is something you will hear from a lot of places, often from people who never were early adopters of neither mail, sms or skype etc.
The reason I made the comment is because it rubbed me the wrong way to cite 13-year-old girl talk as prototypical gibberish. Are 13-year-old girls generally excitable and potentially annoying? Yes. Do they talk in gibberish as a matter of course? No, that's a thoughtless sexist trope.
And I'll place a blind bet that they text faster than you.
Still think an average hn-er should be able to type faster and more correct on a normal keyboard than the average 13yo, regardless of gender.
I suspect that the actual writing style apart from the markup would provide some clues.