Back in my day that wasn't really the case. It's only the last 20 years or so that it's dawned on Eton that they needed to sharpen up. It used to be the case that most of them went straight to Sandhurst, or else the Royal Agricultural College, or straight into whichever City firm Daddy was a partner in. The ones who get in now are no brighter than state school kids applying, but they know how to work the applications system, and how to control the interview process. On the former, to be fair, Newcastle RGS did this 50 years ago - "English? Worcester College, Oxford" "Geography? St Catherine's, Cambridge", etc. Colleges where previous pupils gave you a track record.