Petz, Re: There is one other *possible* explanation, and it come from wbmw. Apparently the Centrino CPUs are too darned impatient. They don't "wait" properly. Those impish buggers of CPUs have a major flaw in their psyche, have no manners, and don't obey rules of etiquette, just like their AMD brethren.
I also hear they're not pulling their weight....