Yes very true Pakistani and Bangladeshi restaurants in Bay area go by Indian Authentic restaurant
This one I usually go into is operated by Pakistanis from Lahore and it's pretty famous also in Bay Area
Shalimar restaurant
Shalimar Restaurant | Based in the Bay Area Specializing in Authentic Indian and Pakistani Food
Again this one is another famous restuarant called "Pakwan" owned by Pakistanis
http://www.pakwanrestaurant.com/
The third one I liked very much is Bangladeshi restaurant named "Tandoor house"
Tandoor House Restaurant - Fremont, CA
there are 100+ such restaurants in Bay area
and Yes their business is 90% dependent on so called "Slumdogs" who have become millionaires working in Silicon Valley.
If slumdogs start returning then these business owners who are so called "Citizens" will have to find some unique way to run their business! Americans eat Indian food coz for taste and not for their diet where as slumdogs who are lazy enough to cook, rely on these restuarants on daily basis