I suppose it's possible there's an island of a pro team that doesn't have any ties to anyone else, but it seems unlikely that they wouldn't have needed to pick up a new dot here or there, or alternatively had a few extra dots from at least one agent and ended up on another team. Once you get to that, there's enough highly connected people that 6 seems unusually large - much like kevin bacon is 3 or less to just about anyone you've actually heard of in hollywood.