timmy's handsign

The article in the w/e Australian on Tim Mathison shows him Boarding an aircraft with him facing the camera's with the PM and others facing away from the camera as they head towards the cabin door.
Mathison is giving his Royal wave with what appears a very distinct salute i.e thumb and little pinkie facing up with other three fingers tucked inwardly.
Curiosity has the better of me, it appears as if some form of salute or hidden agenda and not a normal wave.
Conspiracy theories are plentiful with this mob, just wondering if something else to add to the list.