Plz go to the 'tathyanka' of Janajaati pratisthan or census of Nepal. Just 17% of the population stays in the himaali regions, and all of them are not Sherpas or thakaalis. Khas (Bahun / Chhetri/ Thakuri) are there in large numbers in Jumla, Humla, Mugu, Darchula, Bajhang and Bajura. 49% of the population in in Terai, so I can't ignore that. You can't take it becoz u r too 'hill / ktm centered'. Ur view abou the typical 'Nepali' is similar to that propagated by the 'Panchayat system', someone who wears daura, suruwal, topi and belongs to ether the the bahun chhetri group or some janajaati of the hills or himals.