My 2008 GT is about halfway through its second set of spark plugs based on 90K miles service life. The local Ford agency changed the first set, because I judged a DIY job was risky based on lots of bad press about broken plugs during removal.
So, the second set of plugs in the car now are also Motorcraft, dealer installed.
Are the service replacement Motorcraft plugs still prone to breakage during removal? It's not to early to be thinking about replacing the plugs, including options of another brand of plug and/or early replacement at 50K to avoid stuck plugs at 90K.