I could be wrong, but even if an object doesn't have a texture it will still have at least 1 surface. If the object has a few materials on it to give it different colours then it will have multiple surfaces and therefore texturing would be more efficient.
If you've got a bunch of objects using the same texture however, you can addmesh them all together to make a single surface entity, of course you've got the poly count/surface count trade off there and all the objects are stuck together.
If you've got a bunch of objects using the same texture however, you can addmesh them all together to make a single surface entity, of course you've got the poly count/surface count trade off there and all the objects are stuck together.