It's hard to believe, but your ticket has greater value if you use one day before you trade for a AP. There is a thread here on the DIS but I can't find it.
Thank you DisneyMomOK for asking and thank you Disneynutz for answering! I was just asking my guide about this today and she suggested I upgrade before going to the parks for the first time.
Also remember that you can use a Pass along 10% Discount along with the DVC discount if your going to be doing so before July31`st
Now someone mentioned they had some issues with Tickets linked to the KTTK card with a package so Disney might be trying to close that loophole or they may have came up against someone that didn't know how to deal with it.