It might just be a perception thing, It's like when you get a new full set of tires on your car, Rides like a new ride or when get the noisy exhaust finally fixed. Sounds like a new car, and some how seems to accelerate much faster wow! What it really is because your exhaust was loud before you never gunned it too much because it would get louder

I swore the socketed SE/30 was faster then the soldered one, come to find out after I did specific bench testing, It was all in the hard drive's, one happened to be much faster, (the one installed in the Socketed SE/30)