I'm not much on C&D, but looking at those crop yield figures, most people are still working 3f tiles. Has everyone logged in and re-allocated since the border pops? Someone's working a 1f tile. Someone Exp pushing the hammers? I'm guessing the average is being rounded, so we don't get to try and do a more detailed analysis. But it does look as if we're a bit lucky with the 2f2h tile at the moment.
It may have looked easy, but that is because it was done correctly - Brian Moore