Not quite. I've been collecting since the mid 80s, and I don't remember anything but awe when the Mile High books started to circulate amongst "regular" collectors. The GA White Mountain books were praised as very fresh. People were surprised by the AF15 sale because it was a Silver-Age book.
We have seen at least two pedigrees where some buyers took huge losses when they re-sold: Billy Wright and Vancouver. The market has since "caught up," but it took a while. Money would have been better spent elsewhere.
Besides, I very much doubt that you've seen another case where the criticism of a pedigree was rooted in how overgraded the books were.
Many people couldn't afford the Mile Highs, for instance, but there was universal acknowledgement that they were in a league of their own. The Promise books are not. You might think that they were if you looked at the grades, but at some point people will actually start to look at the books.