I think you need to reconsider your criteria if you think Timmy is any discussion of who's better than Bird.
Bird: 3 NBA titles playing in an era of Magic, Kareem, Dr J, Moses Malone, Sidney Moncrief, Bernard King, Michael Jordan, Hakeem Olajuwon, Dominique Wilkins, James Worthy, Terry Cummings, Charles Barkley, Bob Lanier, etc... an era of truly great players. 2 NBA finals MVP awards
Bird: 3 straight MVP awards while playing in the era of those same players mentioned above.
Bird: Best player on every team he played on which always had other all stars. not even debatable
Duncan: great player, but he's not winning titles against that level of competition nor is he dominating the league where he's winning consecutive MVPs. It's even debatable if he's been the best player on his team the past 2-3 years. (I think he has been but heard quite a bit of commentary by others that think it's Parker)