FWIW...
Funny you should bring this up...I mentioned The Jocelyn Phenomenon to my brother, who's a middle-school counselor. He took a look, and observed that this generation of kids, having grown up with alphanumeric pagers and cellphones, email, and chat, has developed a compressed, "telegraphic", writing style that relies heavily on punctuation (highly-evolved emoticons) and favors speed over accuracy and spelling. We've always had teen slang, and Jocelyn's style (distinct from the emotional overtones, at least), appears to be a genuine example of early 21st Century adolescent written slang.
FWIW...
--Robert