Alex,
I don't really see any quirk there to be honest. I remember a discussion several years ago along these lines, and I'll try and find it, but I was unhappy at using the term quirk, as I felt it had negative feel to it. By the end of this other thread, I was happy with it though... I think it comes from playing on plenty of old courses here in the UK where what people from outside the UK consider "quirk" is actually pretty normal?
I'd say that "quirk" is utilising a feature in the existing landscape, in an innovative or unexpected way, that would otherwise be ripped up and replaced, but gives the green, hole or course a little something extra as far as character is concerned, enhancing the spirit of place?
I'm thinking the 13th at North Berwick: The wall is part of the existing landscape, so using it really ties the hole to the site, but pushing the green to the far side of it brings the green closer to the beach and gives a unique hazard that woukld otherwise be totally ignored or taken away?
Cheers,
James