I visited Thorpe today with a couple of friends. The Oktoberfest theme certainly adds a new, fun vibe to the place, especially with the music that has been composed for it. There's a variety of oompah-esque tracks playing in the main area outside DBGT which are nice to listen to, and a few others playing in certain locations around the park.
As for the main event itself, it is very small and contained, with not an awful lot going on. I would imagine once the stage gets some use it will feel more alive. The 5-odd food stalls didn't really cut it for me.