H. Russell Robinson was a big advocate of the "fore finger" grip, but he also believed there was a difference between War and Hunting Tulwar and the way they were used.
Generally those blades that had a lot of meat in the last third of the blade he saw as War Swords, and those with an elegant taper to the point as Hunting Swords. Animals do not cut back, so the forefinger grip would not be a problem..... Just my two pennyworth here.
http://www.worldcat.org/title/orient...tionsView=true