It ain´t over til the fat lady sings boys.
She will start singing in the final race, Alonso is bound to run into a problem one way or another.
Judging by how the season goes, id say the odds are greater with something going wrong at Hamiltons end than at Alonso's.
And indeed, he wasnt just more lucky today. If that were the case then everybody got lucky bcs of Hamiltons dnf. Ferrari have built a very reliable car and Alonso is making the most of it to the extent more or less everybody agrees hes on a different planet from the rest, at last in 2012.