Welcome to the boards!
The way I am reading this part: "members-only discounts"
, I am lead to believe that yes, you will get AP discounts at both WDW and DL.
ETA: Just found confirmation
It was mentioned in the Disney Parks Blog when the passes were being rolled out that the discounts on the Premier are just the same as the regular DL or WDW passes, only difference is no discounts on D23 memberships. http://disneyparks.disney.go.com/blo...port-unveiled/