Jim for your other question about WOT... yes. Absolutely. Wide open on hills to get 55 mph. On flats I could maintain that speed around 85-90% open.
I weigh 155 in my birthday suit. Also had a pretty heavy rack and a 30 lb very un-aerodynamic bag strapped to the back. Add a head wind and a hill and the bike is working pretty hard to maintain those speeds.
This is stock intake, stock exhaust with Ka'wee mod which essentially deletes the 2nd cat, but pretty much stock airflow.
My gf is about 108 plus gear, and had a much smaller bag on her bike, much smaller/lighter (ie store bought- I'd never hear the end of it if I fab'd a rack for her and my crap welds didn't hold) rack, and she could have passed me on the hills.