The more significant common denominator is actually studying at Oxford university - most of our recent politicians went there
The majority of our current Supreme Court Judges also studied at Oxford.
Surely the modus operandi is more determined by university?
In the case of the politician/s newnamethanks is probably talking about, I would say their approach to life and politics was pretty hard core before freshers' week. So I disagree. But as a more general non Eton observation I would agree. Also, lots of Etonians who got into Oxford in the past now probably wouldn't get an offer. Numbers have slumped.