Do you think bike frame size is less important these days?

Yep. That was me.

Of course if I had listened to my own advice and carried allen keys on the White Rose, I could've tightened my loose headset out on the road.. fuck it.. what's the worst that can happen at 84kph with a loose headset? :)

Did something similar last night. cranked away from some lights and my drive train went quite. Look down to see my rear wheel has moved slightly and is now 1mm from the non-driveside chainstay.
No worries I've got a nice campag peanut butter spanner......at home (piss). The bolts seemed tight enough to get home safely, but they half hamper my race against the guy on a flashy new Trek, who pulled past me on a hill.

I think it is also supposed to be more powerful in a physiological sense (lower q factor, that is).

Yeah that too,
but I think the initial idea was to bring his legs closer together, and make them more aero.