I used to have an untested theory that Oxbridge would be less rah than places like St Andrews, Durham, Bristol etc, because I figured all the middle class kids would apply to Oxbridge and have those as their back ups, whereas the brighter northern state school kids who were applying to Oxbridge would have places like Manchester, Leeds, Sheffield, Liverpool etc as their other choices. So I thought Oxbridge would get diluted by having a lot of bright state school kids in there whereas the other rah group wouldn't.
Having said this, I then had a few trips staying at Oxford courtesy of a girl at Hertford College who I met travelling a couple of summers ago, and I have to say it was a lot more rah than I expected.
However the Oxford rahs were different from the type of rahs you get at Leeds.
In Leeds, the male rahs are rugger buggers who basically sit at the back of the bus chanting and telling loud jokes about rape, and the female rahs are dizzy airheads, "OMG last night I saw Marcus in town it was literally so random"
In Oxford they were slightly less juvenile, their conversations were more pretentious than the banal chat you got from Leeds rahs, but I found them more irritating, there was something sinister about some of them as though they were all trying to outdo each other and get one over on each other, whereas the Leeds rahs give the impression of blissful ignorance and acceptance of the world.
I'm not knocking Oxford students in general though, the girl I knew from travelling wasn't like that, neither were the couple of friends she mostly hung round with, but the unpleasant characters seemed to be very dominant in the social scene there. If you'd have transported them to Leeds, there would have been people in my halls who would have told them to pipe down their attitude, but in their Oxford environment they seemed to hold high status and they got away with making others feel inferior.