Not really trying to speed anything up. I am just a knowledge junkie. I like to make informed decisions on the stuff I buy. I figure if I am going to drop $60 -$70 per tire I want to know what I am getting for that money.

You would't buy a car just because someone said it was this or that without any proof to back the claim up. I bought the 'dillos cause I wanted something rock solid to commute on because changing flats in the rain sucks and I grew tired of it after the third puncture flat in two days. I understood the trade offs, but if I want to replace them I would like to do so for a similar tire that has a little less rolling resistance. Yes I will be going back to 25s.