At no.wp there are now questions about establishing thrust for users within small or closed groups where it is no or very little knowledge outside the group. Such situations will occur very rarely on english, or one of the other large wikis, yet it can occur very easily on smaller communities. It can although happen on a wiki with a large community if the given area of knowledge is sufficiently small.
An example is something like tetraploid salmon in fish farming (http://en.wikipedia.org/wiki/Fish_farming), where the english community might be able to check if this is meaningful and parhaps also the norwegian community, irish community and chilean community, but what about the polish community? Will they figure out the relations? Will a editor writing about this gain correct trust? Note that the places are known for salmon fish farming, someone in the polish community might now about this because there are fish farming in Poland - just not with salmon.
I believe the system in the mean will produce valuable information, but it will not be very accurate without additional measures.
John