I ordered some 6' sync cables. They seem to work fine for syncing and for charging my iPhones. I have noticed with my iPad, they charge very slowly. Also, if I'm using my iPad they really don't charge at all. My percentage actually went down while plugged in and I was using my iPad. When I use the 3' Apple Cables, I don't have any issues. It charges while using and charges faster. These scenarios are while on the 10w charger in a wall plug (not a USB). Has anyone else noticed this or observed this? Why would it be different?