Yes, but I got 3 rear flats out of 4 rides. I took that as meaning I needed to change the rear tire (which I just did.)

I do notice the frame is substantially stiffer than my SL2 Roubaix was. It's a fair bit harsher over rough pavement. I don't have the CG-R post but I can always throw a 28mm rear tire on it and drop the pressure. I'll eventually be upgrading to wider rims which allow you to drop the pressure ~10psi.