Unlike others here I'm not going to try and sell what is, for all intensive purposes, the martial races theory. The soldier here performed well not because of his heritage but superior training imparted to him by the Indian Army. The idea some communities are inherently better warriors than others in the 21st contrary is pretty stupid really and I'd advise my Indian friends to stop propagating this nonsense as the world will only snigger at you and by extension the Indian Army for believing such falsehoods. The ONLY thing separating an effective soldier in the 21st century is TRAINING and EQUIPMENT. The former can overcome less of the latter and vice versa- to an extent, obviously it is better when you employ both together.
I'm sorry but in a conventional scenario because they have the latter (superior equipment) most grunts in modern armies would be more effective in a 1vs1 performance comparison against the average Indian grunt and by extension Gurkhas in the IA.