I have been in both the TB breeding biz and sport horse biz for a long time. I have yet to see a good sport horse with Storm Cat in the pedigree, unless there were other good sport horse influences who were also in the pedigree.
Storm Cat was/is a medium sized horse who excelled at shorter distances. He is short coupled and has a bad personality.
Not traits that sport horse people usually look for.
Saying that Storm Cat is a good sport horse influence is like saying that Mr. Prospector is a good sport horse influence because he is seen in a lot of sport horse pedigrees. His son Fappiano IS a very good sport horse influence, but it is not because of Mr. P; Fappiano’s dam, Killaloe is by Dr. Fager who himself is a good sport horse influence.
Since Storm Cat was a very successful sire, he commanded a stud fee of $500,000. Only the best mares were sent to him. And good mares tend to have classy families which breed on.
IMO, anyone who has or hears about a good sport horse with SC as a grandsire should look elsewhere in the pedigree for the genes responsible.