Here is an insightful take on this topic by Sridhar Vembu (Founder of Zoho an India based startup BTW) http://blogs.zoho.com/general/why-it-happened-in-souther

Here is an insightful take on this topic by Sridhar Vembu (Founder of Zoho an India based startup BTW) http://blogs.zoho.com/general/why-it-happened-in-southern-india-an-unorthodox-explanation http://blogs.zoho.com/general/why-it-happened-in-southern-in... Although it focuses on only one region of India it provides more clues to answering "Why there are so many engineers in India?"