Many of Cina Wong's letter and word comparisons can be found in the early hardcover Free Press edition of Sex, Lies, and Handwriting by Michelle Dresbold. Wong's material was used without permission (or attribution) so it was removed from later editions.
It's not just the q that look like 8. It's weird angular e, Fish hook L, three different kinds of d, manuscript a, pointy bottom c, the ze combo, boxy top p, a comma with a tail that curves to the right, et cetera. (That's a story in itself: after Patsy got a xerox of the ransom note, she started writing etcetera instead of etc.) There's the way Patsy and the RN writer connect certain letters.
(I haven't found the q from Patsy's known writings that appears in the book. It has upper and lower lobes of equal size and really does look like an 8. Any help?)
fr brown:
This isn't connected to q and 8 as such, but perhaps you would enjoy watching Patsy assume the role of handwriting analyst: