Funny, I just had this same exact thing...same location of the coolant leak too. The only difference is the dealer's mechanic says the leak is only from the gasket to the manifold (the silver metal assembly just above where the leak and your arrow points) and they will not touch the water pump. Reason being, the water pump is below the leak puddle therefore they claim the water pump cannot be at fault as fluids don't usually travel up. Also the water pump is inside/behind the timing belt cover, thus more difficult to get to and they cannot justify that work under warranty. They tell me they will replace the gasket only (under the same warratnty) and if I experience engine overheat issues (which I don't have now) then they would investigate the water pump. Oh well...?