Before everyone switches, golf is more like a tennis serve just not over head. Maybe more like a bounce serve. The reason is that there is more power in a serve than a two handed back hand. A stiff wristed two handed back hand may be a similar swing and could be accurate it is always a shorter shot. You could hit a two handed fore hand in tennis harder than a two handed back hand if your were going for power, but you don't need that much power in tennis because of the shorter distance you hit. The racquet ball players I have taught, do great using their racquet ball serve motion for golf, just with both hands on the club.