I dont consider arms down to 90 degrees as a partial rep to be honest? Thinking about it my elbows probably go a bit lower than shoulder level but not to the extreme of the DB touching my shoulder.
At the end of the day, someone pressing 50's to circa 90 degrees is more advanced than someone bringing their elbows down by their sides with 20's. It's normally the kids with the 20's who claim the men with 50's are "not doing it right"...