Whichdoctor
As I said, my research was imperfect and needed lots of common sense applying to the results. I don't know if Oxford's results included modular and integrated courses, but it will have excluded anyone who did not do a JAA licence. When I visited OATS they said that the Algerians do not. Therefore, I conclude that the flying pass rates exclude the Algerians. Oxford were certainly very uncomfortable about discussing their pass rates.
As for your own experience, you may have go though with a better than average bunch. Also, the pass rates are poor when compared with other schools; if you trained only at Oxford it would have been difficult to compare, would it not? However, most people who trained at Oxford had lots of good to say about their flying instructors, with one notable exception.