But to clarify further, what you're experiencing, at least as you describe it, is not "problems" in any way. The problems Al describes would be when the shifting becomes sloppy and noisy. You'll probably notice it in the rear mostly. When you shift to another cog it won't shift immediatly, but will make a clicking sound for a bit and then maybe shift. When this starts to happen, take it into the shop and have them tune your brakes and derailers.