Par for the course is NOT taken into account, only gross score; nor is the difficulty of the course, since there are no slopes or ratings (as in real golf). No adjustments are made ... So, 65 is 65, whether it's -7 or -5. So assuming you shoot lower on shorter (par 70) courses than on longer ones (72) -- with extra, easily birdie-able par 5s -- yes it's in your favor in terms of lowering your average, although the easiest courses are generally considered to be St.A & Kiawah, which are par 72.