I agree that I have not seen any team play dirty.
I think for a team like Sting Black it's unfortunate their size & speed are often stated as the reason for their success. Several teams(San Juan, Surf, etc.) have good size. In fact, at this age, the size difference within a team is vast including Sting Black as they have several small players who are tiny.
IMO, Sting Black represents when 06 athleticism incorporates good soccer. I feel like ALL of the CA teams play really good soccer but the age group is in transition as most of the very athletic 06s are playing up. The Sting Black AP 06 starting lineup consists of most of the Sting Black players who made it to semi-finals of Surf in the combined 05/06. The team was not the biggest team in the tourney last year.
Sometimes a team just deserves credit for being good without the qualifers....