I can't speak for Nancy but my guess is the comments came from the fact that the mare was very nicely bred and should of been bred to a purebred Arab not a Shagya.  Now the resulting foal is only 1/2 Arab and although may be a very nice horse, it's still not a purebred.  Which is a shame with the pedigree the mare had.

A lot of people are under the impression that Shagyas are still purebred Arabs (not saying you are) when they're not.