Mihir, have you ever heard of the statement "Ignorance is better than half-knowledge". You seem to have just half-knowledge and want to become an expert. Who told you that Nilekani was CEO for just 1 year? He has been CEO & MD for nearly 5 years now... that was the time when NRN started leaving the reins of the company and becoming a global ambassador for Infosys!
And if you think Nilekani wasn't doing his job, just look at the sheer number of people who have joined Infosys in the last 5 years. I joined Infosys in 2000 and my employee number was in the 9000's and now, the employee number is close to 80,000! Just imagine! 70,000 direct jobs have been generated and remember, each one of these 70,000 people were paid an average of atleast $30K p.m. So, how do you think he was not able to manage CEO job? Just do some research before typing out anonymously!