Lots of differrent mid-polygon count meshes rendered with instancing. ~30 fps on Nvidia gt525m, ~19 fps on intel hd 3000 laptop graphics cards. Using just frustum culling to reject renderable meshes on cpu.
Models by ahedov on Blend Swap: http://www.blendswap.com/user/ahedov (windmill) and
OliverMH on Blend Swap: http://www.blendswap.com/user/OliverMH (trees, rocks, houses)