Replace LA with anywhere sunny and 'glam'.
That white Boxster driving through Slough in this weather would get ruined and look crud. Parked up by the beach front in Florida is a different story.
Plus as I also said - it's 'only' a Boxster. Bit in your face color combos should be saved for the really expensive and rare stuff.
Most vans are white as it's easier to read writing off them and people don't want to pay extra money on a work tool. Not to look good.
Personally, I think the new Boxster looks fantastic. .
Any car driving anywhere is this weather will look crude. White isn't a real exception.