It's Porsche's own sportsdriving training (2 days) which we just thought sounded a lot more interesting for the money than the half day class in the UK: http://www3.uk.porsche.com/isapi/english/gbr/news/drivingschool/drivingschool/training/advanced.asp

We're signing up for the 17/18 of Sept in Leipzig. The event on June 11/12 is full (could likely get in through waiting list but with family coming that weekend it's not an option for us). They offer Boxsters to rent for the course.

If anyone has done the Porsche training in Germany I'd be glad to hear about it. Will likely post the question in the German forum as well.