F1 statisticians have not reached a consensus of whether Ascari won 9 or 7 races consecutively in 1952-53. If we discount Indy 500, he won 9 F1 races in a row. If we include Indy500, then 7. In the latter case Ascari shares his record of consecutive wins with Michael Schumacher (2004).
Vettel has got 5 in a row now. 4 races to go this year. He can reach 9 consecutive wins by the end of 2013 if everything goes perfectly, but getting 10 and beating Ascari would demand RBR getting immediately everything right with the next regs from 2014.
So what does your gut feeling tell? Red Bull is so good that it looks like only misfortune like reliability, accidents, whatever can stop Vettel from winning for the rest of the season. Will it happen?