Yes you should get about the same avg mileage as anyone riding a dual pin 1100. Riding style has a lot to do with mileage. You should keep track of several tanks and where and what kind of riding you are doing. It's also very difficult to fill the tanks with fuel to the exact level everytime too, remember 1-qt = about 10-12 miles.
Sometimes I get near 50mpg other times closer to 40mpg. I try to be at a gas station before I hit reserve 130-150miles from the last fill-up. Highway speeds (65-75mph) really burns up the fuel.