I was out notebook shopping with a friend today and the ones he liked had a P4 CPU on them. We also saw some laptops powered by the Centrino CPU and I couldn't give him much info on why they are slower and why they are the new rage. The question is, what are the benefits of the Centrino technology and why are their speeds rated lower than a regular or mobile Pentium 4? We saw some Centrino's rated at 1.3GHz, while all the P4's we were looking at had atleast a 2.2GHz speed rating. Do the Centrino's actually run slower or is the Centrino rated on a different scale than regular CPU's? Any info would be greatly appreciated.