I generally do not post here as a "moderator" unless there is something (4 letter words, sexually explicit) to moderate.
Actually all the perfect pitchers that I know had little trouble retaining music. As a matter of fact 2 choral perfect pitchers that come to mind were conductors and had uncanny 3D capabilities. We felt like we couldn't hide - in any musical respect. Both conducted without scores. Maybe I am mistaken in attributing perfect pitch to this type of multi talent.