Seems to be the trend. I'm 42 6'3" 210 lbs. On flats I run 19-20 over 45 miles. I have a weekday 15 mile with lots of climbs, 15-16. Riding on a well maintaned 22 yr old CroMoly Schwinn. ( I love this bike and just can't part with it!)
I also ride mid week on my Trek MTB to mix it up.