An aside - I wonder if any founders in that list came in on investor visas?
I don't have a lot of experience with Tata and their ilk, but from what little I've seen, and everything I've heard, it sounds like they are just as bad as the typical low-level enterprise corporate IT drone you'd expect when that's what you're asking for -- and that's typically how they get involved. I'm sure they have other skill sets, and I'm sure there are some very talented people mixed in that pool, but I'm not convinced that the best of the foreign talent that we want to target is coming through those routes in significant numbers.
That is, how many American students meditate on the ineffable mysteries of the efficient market hypothesis and then decide, hey, marketing is an easy major and the job prospects aren't that much worse than tech. Better -- how many did that in 2002?
http://tech.economictimes.indiatimes.com/news/startups/india...
I don't care enough to validate if everyone on that list held a H1 at some point, but they're all born in India and went on to start large companies in the US and were likely on a H1 at some point. And this list ignores people of all other nationalities and only limits itself to companies valuing > 1bn.