That also runs into transportation problems - my understanding is that there are a lot of people without their own cars in India (especially dense places like Bangalore) who rely on public transportation which shuts down overnight there.
Sometimes the transportation issues work in our (US) favor though. I felt kind of bad about doing meetings early my time, which was kind of on the late side in Bangalore, until I realized that practically everyone there worked on a late schedule to avoid traffic. Without that factor, there would have been no time convenient for everyone.
