Gotta agree with Mat etc. It's still a Porsche, a test drive will soon make you realise how they outclass a golf in almost everyway. I had a Cayman R on an extended test drive last weekend, what an epic car them things are!
It made my TT feel like a numb fat lump, granted my car made the Porsche look silly in a straight line but does that really matter? IMO, not at all, I would take the Cayman over mine in a heartbeat, the way it cornered , the build, the ride, I could go on and on. It really opened my eyes to how insignificant straight line speed is