I just traded up (I thought)...my 13" MBP Retina for a new 15" MBP Retina. The 13" shows the processor was a 3GHz Intel Core i7. The 15" shows the processor is a 2.5 GHz Intel Core i7. So, does that mean the new 15" is actually a slower machine? Both were pretty much top of the line at the time of purchase, so why is the new one showing a slower speed? The 13" was an early 2013...the 15" is a mid 2014 (hopefully that is the latest as I just bought it day before yesterday.