Everyone has said it all, (ignore Mooky). As far as climbing goes, I'm slower climbing now on my Aero, than 10 years ago on my Trek, but I'm now 51. I'm able to ride and train more throughout the year because of less pain overall. So actually my avg speed is good.
As far as climbing, I've completed the Markleeville Death Ride, (15,000 ft over 5 mountain passes in a day) 7 times on a bent. My times have improved over the past 3 years, since I got my Aero. Keeping in mind that I should be getting slower at my age, this makes me happy.
I was getting problems with saddle sores and prostate problems from my Trek, that's why I got a bent.