I have an Anna apple that hasn't really lost its leaves on it's own the whole time I've had it, is Dorsett golden the same?
Probably. If you want the trees to relax into a more typical growth pattern (and even actually have a rest), you can defoliate them by hand sometime after Thanksgiving. It certainly makes any spraying and pruning a little easier. Of course, if the trees are really big, that may not be something you'd want to do.
Pink Lady is also notorious for this; the new leaves just push out the old ones. I've tried stripping the leaves by hand to see if it makes a difference for blossoming date and productivity, and it affects neither. The only reason I strip the leaves is to spray dormant oil and also to make it easier to paint the trunk and horizontal limbs white.