Everyones knows what the most academic colleges are; Meton, Balliol and John's are up in or around the top 5 every year. Everyones knows what the weaker colleges are; LHM, Mansfield and Queen's are normally down in the botoom 10. And in between they're all pretty similar. I wouldn't advice any propsective student to use the Norrington Table, it's a complete waste of time, and colleges yo-yo too much; Trinity 11th last year and 23rd now, Brasenose along similar lines. It's to unreliable - and you can get a First from any colege anyway.