[EM] Extent of quota violation in Webster

[Kristofer Munsterhjelm]

It's well known that Webster may violate quota. But (because of my 
investigations into more sophisticated "manageable" party list methods), 
I'm curious as to how far from quota it can go.

Does anyone know how severe a quota violation Webster can have? Is it 
limited to one seat maximum due to the locally optimal allocation 
property of Webster itself - i.e. that you can't alter a single 
assignment and make everybody better off? Or can Webster violate quota 
to a greater extent than this?