Don't forget the Damocles law, which is active for several years now.I agree, but a lot has changed since and the last decades Dutch laws have become more and more rigid. So selling clones is now illegal in the Netherlands and less accesable.
I haven't visited the shops for a long time, but from friends I hear the overall quality seems to be less these days (hear say ofcourse). New laws pushed it from the idealists/hobbyists into illegality and organized crime.
I think this might also be a reason Dutch seedshops have lost some genetics, as they also suffer under these new legislations.
Ofcourse you'll always have some different pheno's. But these days if I plant the same strain from three different growshops, I'll sometimes end up with three completely different plants.