There are a number of different meshes you can select, depending on the product (see Modeller & 3DPrint product pages).
For Modeller, the default Animate head mesh has 5790 quads and the mouth has 74 quads and 24 tris.
For 3D Print, the default Solid head mesh has 23462 quads and 152 tris. You can also choose to subdivide the mesh into 188304 triangles.
For Artist, Check the poly count of the Genesis mesh that you are exporting to in Daz Studio.
Best wishes,