Found some Interesting statstics From comments of F1 fanatic website
Some interesting trivia from there:
* Juan Manuel Fangio has never finished on a Grand Prix podium if he didn’t start from the first two rows.
* Alain Prost won 8 races starting from pos. 5, 6 or 7; he only won 2 races starting lower.
* Ayrton Senna only won 2 races starting lower than the second row, and finished on the podium only 6 times not starting in the top 6.
* Out of his many wins, Michael Schumacher won only 6 races starting lower than the second row, and finished on the podium only 9 times not starting in the top 6.
* Fernando Alonso won only 3 races starting outside the top 4.
*Of the 392 combined race wins of these drivers, only 41 (less than 1 in 9) were not won by starting in the top 4.
*Of the 193 combined race wins of the modern day drivers, only 18 (less than 1 in 10) were not won by starting in the top 4.
*Of the 795 combined podium finishes of these drivers, only 97 (less than 1 in 8 ) were not achieved by starting in the top 6.
*Of the 440 combined podium finishes of the modern day drivers, only 42 (less than 1 in 10) were not achieved by starting in the top 6.