It may also be that my back problems do not allow me to ride as upright as the guy in your picture does.
I don't see why back problems would stop that - the plusher tyres and slightly-lower sprung saddle means one's back (or backside!) doesn't receive many shocks even over quite rough ground where the bike is bouncing around (felt mainly through the hands). I guess it would be painful on thin high-pressure tyres and a hard saddle.
Actually, the pictured bike is using some unknown variety of Porters rather than North Roads because that's what came on it and I've never changed them because it wouldn't be much of a change.
The picture also shows me sat more upright than often because I'm halfway through an S bend in town - I think having the brakes at the most upright position makes more sense than having them on the hoods/drops because sitting up slows one down due to being less aero - and why would I have my hands over the brakes if I wasn't expecting to slow down? For pushing on in open country, those Dutch tri bars are useful
