ConsFW, you are totally right. Sato was always slower than Button but always faster than Davidson. In the times of "3rd driver fridays" I thought Anthony was damn fast, till he raced in the same car as Takuma.
I don´t understand how Piquet can be that slow. He fighted Lewis in GP2, he was Renault tester some time, (didn´t those guys see that coming? even if he was driving that slow?

) there has been sain that he is a "slow learner" and that he will progress much, but F1 is not the kind of series that will wait for you.
IMO, Nakajima was NOT "Piquet Styled", at least that´s what driver standing says.
Many other faster men were given much less oportunities. This leads me to rememeber one of my firsts post around here, when I questioned if a man like Ralph was there because of his name or what and how Fontana swept the floor with him in F3. BTW, did anyone see what Fontana did in last TC race? =D>
"You need great passion, because everything you do with great pleasure, you do well." -Juan Manuel Fangio
"I have no idols. I admire work, dedication and competence." -Ayrton Senna