Popular food preferences are different throughout the world and even locally. It is personal preference. Some factor is by what a person grows up eating. I do believe curry is most popular in India, and India was a British colony at one point and maintained a higher level of direct trade than in the USA.
I live in Las Vegas, NV USA and I do believe every type of food in the world is available.
There are over 6000 restaurants within 12miles 19.3km from my home. About 43 per sq mi or 5/sq km
There are 28 Indian restaurants.
The 2011 UK Census recorded 1,451,862 residents of Indian, 1,174,983 of Pakistani and 451,529 of Bangladeshi ethnicity, making a total South Asian population of 3,078,374 (4.9 per cent of the total population), excluding other Asian groups and people of mixed ethnicity
US is about 1.5% South Asian.