Pedigree Query

I found interesting article about sirelines in USA

http://www.blacktypepedigree.com/articles/the-most-frequently-sought-stallions-and-sire-lines-in-this-years-breeding-season-in-north-america

Interesting read. Thanks for the link.

How many of those mares were A, B , or C, judged by their produce record. How many were maiden mares ? I favor mares, that bred winners when bred to different stallions. Is it the stallion or the mare, that influences the mating, or a combo of both individuals ?