The true test, the way I see it, is how the bike feels on roads I've been riding 3-4 times a week for the past year. Roads I know. The real surprise isn't that's faster or easier to ride than my Kaitai; it's that it's faster AND easier. I often found myself cruising along on the 52T chainring at 17-18 mph with no strain. I found it hard to keep my HR in the 130's... I'm used to cranking along in the 140's. I took a few short climbs I know well and... well, "easy" is a relative term but it *was* easier and again, at the top, my HR was a full 10+ beats below what I'm used to seeing. There is no strain, the bike just glides along smooth and sure. As I said in an earlier post, it's almost like: you think "go" and it goes. I'm getting used to the Tiagra brifters and the 105 RD is a dream; quick, positive, quiet and smooth. Finally came that last climb home... my 500+ foot, 11% friend. I hit an new max of 176bpm at the top but I think it was because I could push this thing so quickly up the hill (I can't wait for my Cardio visit next week so I can find out how hard I can push. 176 just scares me) . I still need to learn how to pace myself, especially uphill... I haven't figure out yet if I want to hit the hill running and gradually shift down into a slower pace as I progress or to establish a slower pace early and hold it. There's still so much to adjust to with this bike but the early report is -surprise- I love it.