I know girls that talk faster than they can think so every third word is "like". In this case it's not a pause but more of a tick. Sometimes I am in awe of the content density. They can talk for hours and say absolutely nothing.
For example, I could say "kristianc was like, OMG it is NOT a pause or a tic, it is SoCal dialect!" in a sarcastic tone and roll my eyes.
edit: This form of communication doesn't translate well into digital form - email, texting, etc. - unless both people are familiar with each other's body language and the dialect to visualize (at a conscious or subconscious level) the meaning.
Heh, I'm the other way around.