Quote Originally Posted by D-Type
What is mysterious is how some drivers shine in junior formulae but seam to run out of impetus when they reach the top formula.
I think one good example of that was Mika Salo. He was very close to Mika Häkkinen in British F3 in 1989. Häkkinen was more introverted and focused and therefore he succeeded, Salo was more extroverted and outgoing and didn't succeed as well:

http://en.wikipedia.org/wiki/Mika_Sa...arly_F1_career