>I decouple the focus from the shutter button (AF-On) so have >not noticed. This might offer a convenient solution for you. > We do Sport Events. AF-ON is the only way to go. It is much easier to prefocus. You can even hold it down while you shoot a series of action shots.
You might also reduce the CL shooting speed to 3fps or less until you get used to it. Mine is set for 4.