I don't know, but I saw an article a few months ago about the NEW way kids are typing to confuse their parents, l33t speak!
they included "lol", "brb", etc and all that kind of stuff.
That made my crack up. The normal shortcuts people use to chat are NOT leet speak. Also, this article was written in 2005 and it was making leet speak out to be a new thing.
And I don't know about you guys, but i've never known anyone who used leet speak to hide what they are saying from their parents, they did it to be l33t
The article claimed that leet speak was used by online bullies, so that their parents didn't know they were being online bullies....
some peoples' ignorance amazes me.