Guild Wars 2

Should be 13% as the patch indicated, but is only 4%.

There’s no notes stating otherwise.

Bug forum has gotten little response, perhaps a Dev will actually see this here.

The trait’s tooltip says the trait differs between game modes. Anet could have been more thorough in their update notes’ description of the changes to Versed in Stone to mention that, but it doesn’t seem unreasonable to conclude that it’s functioning as intended. +13% for PvE and +4% for sPvP and WvW.

Yes they did in fact finally reply and confirm the reduced effectiveness in PvP and WvW. The wiki was also updated.