I went to Durham. I was - I am - a posh kid - albeit one who’s acutely and painfully aware of his advantage. The college I was in was stacked to the rafters with posh kids. Everything orbited the social life - the balls, the ents, who was where in the pecking order of committees and executives. I mean, the college was in a literal castle. If you were reading arts, it was easy enough to stay entirely within that world. Economics, politics, classics, history, philosophy, etc., were all filled with pashminas and brogues. I spent time in those lectures as I was running a miniature essay mill to boost my social standing, as that was just what you did.
I read physics - and the crowd couldn’t have been more different. The majority of science students were in the hill colleges, nearer the science campus, and came from state schools, rather than the mess of public school alumna you found in the Bailey colleges. I was a lone wool blazer in a lecture theatre full of t-shirts, rope-knit jumpers, pink hair and leather jackets.
For me, it was an illuminating experience, and it made me realise that I didn’t really fit in either tribe - although 20 years on, the few people I’m still in touch with are from my course, not my college.
The U.K. is a peculiar place when it comes to class. I realised over the years that how I said what I said, how I spoke, how I dressed, were all far more important to our business (because of course I started a business, with a posh friend from school) success than what we said, what we did. To other posh people, it says you’re one of the club, you can be trusted, nice school tie - to people from outside that world, it induces either a hat-clutching deferent reverence, or outright hostility.
I liked the people who were outright hostile, because by that point I absolutely hated the same thing that they did - even though I benefited from it.
Anyway. Experiences vary, and which college you’re in has a huge impact.
I can't find out the college he attended, but I agree that college choice really can impact who you meet and the general "vibe".
My experience at Cambridge (similar path to you, Alex) is also at odds with this article.
There may be differences due to the subject, level, or college. I did a one-year masters in STEM in a very international graduate Oxford college. But the vast majority of members of the college were hard working, insightful, friendly, and not at all posh. There was a very friendly and open social life, and I definitely don't consider there to have been a great facade presented. Perhaps I would have found different in an undergraduate degree in the arts, or a different college, but I didn't get that sense from the people I spoke to from other colleges and faculties. My best guess is the Oxford college the article writer ended up in was rather more grand and snobby than any of those I spent time at.
I suppose what I'm trying to say is that this certainly isn't the only experience, and I'm confident none of the friends I made there would relate to the article's assessment. I found it a fantastic place to meet insightful, honest, friendly people in addition to all of its merits for learning.