Cool article. I find myself using semicolons often on facebook and the like, but in text messages I usually opt for the run-on sentence. It might be to seem less pretentious, or just because it's one less button-press.
This comment was written with a hyper-awareness of where I might use a semicolon; I doubt it can really be taken as a measure of how much I use them. How about this: ;_; (probably accounts for 30% of my typed semicolons).
I had read both of the linked articles and found them interesting so I like that people are referring to them and continuing the conversation.