Yes most factories report horsepower at the crank, while magazines like Cycle World dyno their test bikes and give rear wheel figures.
"Reported" horsepower for the Vulcan is 63 I believe. I think a member had his earshaved VN dyno'd and reported 53-54 HP.
My FJR listed a HP of 145, dyno runs by owners are in the 125-129 range.
Shaft drive bikes eat up a bit more power than chain drive bikes BTW.