Wife and I each got a new iPhone 4S. I picked up a black bumper at the Apple store. Nice, "grippy". Got home, wife decided she wanted one, but in white. I order it from Apple's website. Get it in, and it isn't "grippy" at all. I cannot feel any difference between the edges and the middle of the bumper. It is hard and slick. Anyone else have a bumper with this problem?