Is there a break in period on pc gear????

New topic, can a system over time "break in better" and be able to attain more overclockablility..?? such as a new stick of ram vs and older of the same kind...?? or say a new 2600+ used hard over a brand new one??? do solid state electronics slowly go out of spec and suddenly be able to overclock a bit better..?? what is your opinion..??