Hulkenburg took part in 14 practice session this year, and 8 times he was the faster Force India driver. It was 6-2 when he was up against Di Resta.
So he lost 4-2 to Sutil? so surely since Sutil beat the man who thrased di resta, he himself would thrash di resta, according to f1 fanatic, their qualifying was 9-9 (i dont know if they haven't updated it for brazil or if they discounted a Q3 where neither of them drove)
This leads me to the startling conclusion that practice means nothing.