Sorry I'm not claiming it was something completely new, I'm simply stating that it's usage in informal speak has seemed to pick up the same usage it was originally when the younger generation started using it for informal communication channels like texting. But as it has adapted for the younger crowd it has remained the same (highly anecdotal) among those I interact with who are older.

The ellipses are actually a really old form of informal sentence-separator. If you dig up old postcards from the '40s, they're packed with ellipses.