Before designer drugs really took over the game, pedigrees had more meaning esp in graded stakes. They still do but not the same way. It is not mentioned much in specific detail but many sires flat out could NOT get horses to go 1 1/4 for instance until the last decade or so. Just wasn't happening. There were limitations and you could BANK on it. Then some trainers started making it happen for some of these sires and then people started talking about it must be from the Dam side. Ex. City Zip as a sire. I'll let others connect dots on that one.
So long story short, in my early days of playing, I followed pedigree more and followed all of Jerkens horses very close during 2000-onward when I dove into the game. I knew with the name Shop Again she had to be related to Miss Shop and did not recall the Trappe Shot connection who was trained by McLaughlin until I looked it up.