It might be a bit uncomfortable to accept. But Jhaveri's right. One can argue that the 20-20 team won the world cup, and that it is very important.
Viswanathan Anand does much tougher things day in and day out, and so did Paes and Bhupathi in doubles consistently over the years. The fact is these other sportsmen have a much tougher competetion than the Indian cricket team which deals with only 7 other test class teams, with lots of easy matches against teams. Logically, if we are really celebrating acheievement, Vishy Anand must be the biggest sporting icon in India.
Further, this 20-20 tournament is now on the map, only because India won. Nobody would have taken it seriously, if say NZ or WI or any other team won it. At most, it would have been considered a successful exhinition event.
Let's not kid ourselves. This is a good achievement. But most teams didn't even take this seriously. Now, after winning, we might say this is great. But if India didn't win this, this 20-20 tournament would have been much (and a lot) less relevant than the upcoming series against Australia and Pakistan. Reality changes, based on result. Twenty20 is great, because India won in this format. It wouldn't have been, if India lost.