From what I read in previous discussions in forum and on IRC, this is a net increase in food for Dwilight, and a net decrease in food for all other continents. Dev's can feel free to correct me on that though.
This is correct.
Food is distributed away from cities and townslands.
Gold is distributed towards cities.
Total gold on each island is increased by about 10%.
Food surplus is increased only on Dwilight: it is decreased on all others -- in some cases (BT) by very large amounts. The specific amounts vary per island.
Also, BT and AT regions no longer have matching stats!