A lot of users will disagree with you.
Well its partly right especially when the best connection in terms of signal quality is actually by (err!) Reliance. I have heard they provide the best lines for their Zapak Gameplexes. I am however clueless if a connection of the same quality is provided to normal consumers.
Apart from that, Airtel is really good for gaming, giving consistent pings and speed and almost no downtime. Just completed a 30hour online download on my PS3, with no problems or signal drops, that too into a weekend (Saturday).
Having said that even BSNL seems to provide good pings but I have heard some report problems with it when I made this exact statement earlier.
From personal experience I would say airtel (despite how much their FUP sucks!). Also I am aware that there might be other providers who are better (Beam fiber ???) but they might not be available everywhere.
Lastly I would say this again. Make a list of providers available in your area and inquire about any free slots available and then ask for suggestions on the forum. It might turn out that the ISP we might discuss at length is not available having us to start from scratch.
GN