Irrespective of "reactive" rate cuts by various central banks, RBI was very pro-active in managing the inflows and outflows of money in/from India. The world has taken notice and has appreciated it and many big financial institutes has hailed RBI & SEBI's measures as the best in Asia. I dont remember the name, but one financial instt. even hailed RBI as the best central bank in Asia.
Decoupling or not, since India's growht is mostly based on local factors, any downside in US will definitly affect us, specially in US-centric domains like IT.