I agree with Tmo & Laurie. Nicking is a pretty broad term, so I’m sure your friend and her bloodstock agent discuss it. However, the TrueNicks and Werk are very narrow in scope, focusing only on the sire line and how it relates to the dam sire. They are tools to give people some direction, but only a small part of what should be used when determining breeding plans. I put very little emphasis on those sire nick reports.
And, as an aside, I used to be Director of Sales for one of the larger consignment companies. I can say that I was never approached by a buyer regarding the nicking of any horse I was selling. So, commercially, it doesn’t appear to have much appeal from the buyer’s persepective.
Also, I bred a mare on an F nick once because the resulting foal would have a close cross of two full siblings. The resulting foal ended up being a BC stakes winner and a graded stakes performer. What’s interesting is that this particular stallion had three stakes winners within two years’ time out of mares by the same dam sire. If you look the nick up, it’s still an F. So, the system has some holes in it.