Gurgaon sounds like a fascinating place. i'd imagine that somewhere between the marginalrevolution article in the OP and the wikipedia article, lies the truth.
the slums sound interesting: http://www.nytimes.com/2008/06/09/world/asia/09gated.html
i've always followed slums - they're one of the purest reflections of a city's life-essence. the greatest cooking in the world has always come from slums...
of course, in india the caste system is still somewhat entrenched - especially away from the capital (n.b., not capitol) cities - so inequities of opportunity (not the giving of the unearned to those who haven't earned it, mind you) are easier to deal with, and the Kshatriyas seem to be doing as well as ever.
i wonder if they brought in any of the surviving city planners from the Brasilia project to help with it?