#6 is good . . .
6. They listen to their peers.
Certainly plays out here.
As for the 80/20 rule, it seems to apply to a lot of things. Having seen plenty of claim studies over the years it is true (in round numbers) that 20% of the people generate 80% of the claims.
The challenge is in figuring out (in advance) who the 80% "good" risks are.
And, having in the past a stable of sub-producers it is probably closer to 90/10. About 10% of your producers will generate close to 90% of your business.
The trick (again) is to figure out who the 10% are and concentrate on them.