I have a friend that has exclusively used Britts for the entire time I've used my Vizslas, in addition , my brother and nephew have used Britts, the first one given to him out at the pheasant club we were members of. Otherwise, no telling what breed he may have chosen.
I've done my personal poll, and come to the conclusion, that, whatever the first bird dog one may happen upon, they've stuck with that breed more often than not!