Michael Haupt wrote:
> BTW I don't know how those numbers look in other, comparable, OSS
> communities. Could it be the same?

Easy to find out. Using the "80% rule" (i.e., how many contributors make 
up at least 80% of the commits) we end up with:

- http://source.squeak.org/39a: 2 contributors (sd, md)
- http://source.squeak.org/310: 1 contributor (edc)
- http://squeaksource.com/Pharo: 2 contributors (sd, md)
- http://squeaksource.com/Seaside30: 3 contributors (lr, jf, pmm)

Cheers,
   - Andreas