You can't really compare one touring cyclist's daily average to others unless they're riding in similar terrain.
For me, I try to stay away from congested areas, preferring to ride in the country, the more remote the better.
Most of my tours have been in a mountainous or hilly environment as well, so it's easy to stop and take in the
sights as I enjoy my breaks. My mileage of 75-85 per day would be a lot different if I was riding into constant
headwinds, being pushed by daily tailwinds, riding relatively flat country, or was making my way through cities
one after another.