You're right and I do try not to do that. But as someone who's used text based communication every day for more than half my life, there's definitely some unconscious bias I've developed towards specific behaviors that I don't think is random. I've talked to plenty of folks who feel the same, and there are a lot of memes out there that support it. At the end of the day, it's up to you as the communicator to try and convey what you really mean, and text is notoriously easy to misunderstand.