I've been here for nearly 2 years and have seen a lot (not all of the server) and both solo-ed and partied in those areas..
In only ONE location have I seen probablility squewing... the shadow woods.
Maybe its the number of opponents (so lots of rolls) or the length of combat due to the 50% concealment but I have NEVER in real life or in any other play environment seen as many 20s consistently rolled as I have in these 2 maps.
Is there a code that improves dice rolls for NPCs? Is it possible it was set here and forgotten?