Hi there
I also commute (almost) every day, and usually on my USS SWB Bentech.
I'm not a particularly speedy cyclist, but according to my computer, I
average about 15 mph. On my upright, it comes to about 13 mph. This is
on a pretty flat, but mostly very exposed and often windy route.
For me, the main advantage of the 'bent is that it's hugely more
comfortable, rather than the speed. I suspect I could push the speed
faster if I really wanted to.
Incidentally, a few weeks ago I got stuck behind a tractor on my journey
home. Then I realised I was comfortably spinning along at about 20 mph,
which I would never normally do - I was drafting the tractor! When I
went to overtake it, I realised I couldn't: once I came out from the
shelter it was making, I didn't have the power to pass it.
This made me think about wind resistance and I ordered Azub's fairing
(because there's never a tractor about when you want one). I'm hoping
this will arrive this week, and I'll let you know whether it makes any
difference!
P