Growing up, it was drilled into me to wipe the spout. I do it automatically now, even with my tea pots with sharp edges that rarely drip. My electric kettle (with a sharp, stainless steel edge) has never ever dripped.
Eva Solo makes an amazing drip free teapot that I use everyday and reviewed. It is cleverly designed not to drip by a talented Danish team.
Eva Solo Tea Maker with Neoprene Cover, 1 or 1.4 Liter