"There is a battle being fought at this very moment over the mighty megahertz measuring stick used by both Transmeta and Intel. Each company uses this one aspect of measuring a systems performance to help convey the performance of their products to the end consumers.
At face value this would seem to be an infallible method of comparison. Megahertz is a number (or more correctly a unit of measurement) so it either is, or isn't accurate. There is no need, nor is there room for interpretation - a processor either operates at a specific value of MHz or it does not. Right? Well not always..."
FULL STORY @ TRANSMETAZONE (http://www.transmetazone.com/articleview.cfm?articleID=773)