The dutch version of the site has this huge thread: http://wepowder.nl/forum/topic/105609
It is rumoured (german news sources and online comments) that:
The ABS recall involves 50'000 airbags,
the german service center receives approximately 400-500 airbags per day,
and they aim to have a turn-around time of 3 weeks from receiving the airbag and to shipping it out again.
They give precedence to rescue workers, guides and other professional teams.
Mine was shipped from .NL on January 7th and return delivery arrived the 30th, which seems about the median, with many receiving theirs within 3-4 weeks.