Yes, there have been many threads about expired film, but they have been mostly about B/W film, not medium ISO color silde film.
p.s., I thought you especially might find this tidbit very interesting: On the back of both film boxes there is a message that reads "Kodak Color Slides Make Great Digital Images"
It continues, "Try scanning Kodak slide film to create digital files that can be enhanced on your computer and shared by e-mail or used to create superb prints."
If Kodak says it, it must be true!