Luck is made this way : 3 terrible races, 3 bad, 3 good, 3 incredible. Sometimes even a terrible race can be a win if the circumstances are good for a driver (Mika last year for example). Sometimes all 3 incredible races happen when the driver gets a DNF, or the opposite. It is random luck within random luckOne race Rubens could actually win, is also only race in which he was slower than Irvine and Fisk.
Good luck in title fight guys.