Here is some info about the University of Oxford:
Established in: 1096-1167
With an alumni list that includes 26 UK Prime Ministers, 20 Archbishops of Canterbury, 12 saints, 27 Nobel laureates, 47 Nobel Prize winners and one Sir Stephen Hawking, the University of Oxford is as respected as it is old. While the university’s exact foundation date remains a little vague, evidence of teaching dates as far back as 1096, and some claim it was established even earlier. Current at joint 5th in the world rankings, the University of Oxford is truly one of the highest ranked and oldest universities in the world, catering to a student community of around 22,000 and operating the largest university press in the world.
And this is what we know about the University of Cambridge:
Established in 1209 by a group of scholars leaving the University of Oxford due to political conflicts, the University of Cambridge today marginally out-ranks its elder, currently at joint 2nd in the world alongside Imperial College London. Sharing many common traditions, Oxford and Cambridge maintain a healthy sense of rivalry, which comes to a head in the famous annual Boat Race event. Cambridge has more than 18,000 students, of which 6,000 are postgraduates.
I think we can safely say that CarolDecker may be a tiny bit wrong.