Quote:
Originally Posted by
Lukas 
Actually 'oriented' as a verb is also right in British / 'World' English, as it does derive from 'east-ing' oneself according to a compass or sun. Oriented isn't wrong either though, at least in the UK/World English, not sure about US spelling.
Lukas
As a native British English speaker, holder of A-Level English Language & Literature qualifications, one time technical writer and general upholder of the true tongue, I can say with great certainty that I have never heard a UK native use the American English forms orient/oriented/disorient/disoriented (except perhaps when directly quoting Object Orientated Programming literature originating outside of the UK). To my ear those forms sound very wrong.
I can accept that the American English forms are legal, even in British English, but I could never bring myself to utter them and would be disappointed to hear my countrymen adopt them.
My understanding is that Americans generally think that orientate/orientated/disorientate/disorientated are made up, joke versions (back-formations) of the words. They are not.