some interesting info, maybe/maybe not, but food for thought.
in the past 10 years:
10 different teams have been in TOP 3 in 6a
14 different teams have been in TOP 3 in 5a
(excluding Goddard and Emporia as they have been 6a also)
8 different teams have been in TOP 3 in 4a
11 different teams have been in TOP 3 in 321a