Interesting stats. What would've happened in much closer seasons such as 2005, 2007 or 2008? It'd be interesting to show us what the top 3 or 4 in each would've looked like.
McLaren let 2005 and 2007 slip through their fingers... 2005 was lost through unreliability
2007 was lost through that dratted scandal 
So, two championships for the taking there, both going west in spectacular fashion... 
And the numbers are in for
2005.
Fernando Alonso won the championship in Brazil, when his 23 point lead over Räikkönen (117 vs 94) was enough to win, with 2 races left to go.
If the 2010 - 2011 points system was used, his lead would have been 48 points (282 vs 234) would have been just short of 2 race wins. Eventhough Räikkönen won in Japan, Alonso's 38 point lead after Japan would have been enough to take the championship there.
Also further down the rankings, things would not have changed much.
The points differences between positions would have been pretty much the same, and the first driver to have ended up higher would have been David Coulthard, finishing 11th in front of 12th place Nick Heidfeld (69 vs 68 pts), instead of Heidfeld 11th, Coulthard 12th (28 vs 24) as happened in real life.
2005 points system1. Fernando Alonso - 133
2. Kimi Räikkönen - 112
3. Michael Schumacher - 62
4. Juan Pablo Montoya - 60
5. Giancarlo Fisichella - 58
6. Ralf Schumacher - 45
7. Jarno Trulli - 43
8. Rubens Barrichello - 38
9. Jenson Button - 37
10. Mark Webber - 36
11. Nick Heidfeld - 28
12. David Coulthard - 24
13. Felipe Massa - 11
14. Jacques Villeneuve - 9
15. Christian Klien - 9
16. Tiago Monteiro - 7
17. Alexander Wurz - 6
18. Narain Karthikeyan - 5
19. Christijan Albers - 4
20. Pedro de la Rosa - 4
21. Patrick Friesacher - 3
22. Antônio Pizzonia - 2
23. Takuma Sato - 1
24. Vitantonio Liuzzi - 1
2011 points system1. Fernando Alonso - 322
2. Kimi Räikkönen - 277
3. Michael Schumacher - 153
4. Juan Pablo Montoya - 150
5. Giancarlo Fisischella - 144
6. Ralf Schumacher - 122
7. Jarno Trulli - 110
8. Rubens Barichello - 103
9. Jenson Button - 97
10. Mark Webber - 93
11. David Coulthard - 69
12. Nick Heidfeld - 68
13. Felipe Massa - 40
14. Christian Klien - 36
15. Jacques Villeneuve - 27
16. Tiago Monteiro - 21
17. Alexander Wurz - 15
18. Narain Karthikeyan - 12
19. Christian Albers - 10
20. Pedro de la Rosa - 10
21. Patrick Friesacher - 8
22. Takuma Sato - 7
23. Antonio Pizzonia - 6
24. Vitantonio Liuzzi - 6