Also: Culturally speaking, Germans have (like the Dutch), always valued good product design. There's a nice cultural fit between IKEA (economical, good design) and the german market.
Don't forget that if you're using animation and video to design a captcha, there are a lot of other design options possible: letters appearing one after the other, going in and out of blur, playing with colors, etc... A lot more graphical gimmicks can be added while maintaining comprehension for humans, and hopefully, improving blocking bots.
agree with rouxbe.com. their how-to videos/classes are very well put-together and the community of users incredibly active, insightful and participative.