Wake Up!! McKinsey has made this report for those who are interested in selling a lot in India. So, for them, it's a huge market with more than a Billion people with ample of resources to produce from. In short, a place where huge profits can be made ealisy. (Please note, it does not talk about real prosperity in all terms even other than economic - like peaceful life , sense of security etc.) This same feel of a huge market in a resouce-rich country is the one that brought foreigners here centuries ago. So, this report by McKinsey can be said to be similar to reports by visitors to India before or during the invasions!!
There is a lot said about distribution of wealth in all classes. An intersting parameter suggested by an economist to measure health of an economy is, difference in average incomes of top few percent and bottom few perecnt people. It may address concerns raised by many in the discussion below.