My commutes are 15 miles round trip, on generally flat roads, and I average about 13 mph for them (that accounts for a lot of stop-and-go riding and weaving around the downtown areas).
My group rides are on "rolling" terrain, generally 30-40 miles, at anywhere from 17-18 mph average. I'll gain anywhere from 1800 to 2500 feet for those rides, usually.
I just hit a personal best on a FLAT century - 97 miles at 20.6 mph.
According to my Bike Journal account, my "average" ride (total miles / number of rides) is 23.2 miles at 15.1 mph, and I've gained a little over 1,000 feet each ride. I'd say that's a pretty fair assessment of my year. FWIW, my average HR was 142 and max HR was 189! 
Oh, and I've been riding, more or less, for about 15 years now.
2007 Seven ID8 - Bontrager InForm
2003 Klein Palomino - Terry Firefly (?)
2010 Seven Cafe Racer - Bontrager InForm
2008 Cervelo P2C - Adamo Prologue Saddle