Looking for feedback here on booking and getting any kind of saving with Amex Plat IAP (International Airline Program) on Air Canada bookings. Apparently AC is part of the Canadian version of Amex Travel IAP available to Plat card holders. When I tried a couple of booking on-line with Amex travel, seems like there is no saving compared to a regular booking on AC or elsewhere.
Anyone have any luck with this ? Do I have to call in ?
Some of the other forums mention savings with the IAP program but they seem to be US based and on airlines other than AC.

Thanks