Epapp, here you are. Towards the end. I knew I read it somewhere semi reliable. There's also a fairly lengthy discussion on a Pedro's board thread. Google aos cause maf and you'll find the thread. Maybe not that common but some claim it happens.
Porsche Boxster Mass Air Flow Sensor (MAF) Replacement and Troubleshooting - 986 / 987 (1997-08) - Pelican Parts Technical Article