You have to consider what you're riding, too. If you have a 150mph motorcycle that your ride fast, the shorter intervals may be a good thing. However, a 50-60 mph Enfield shouldn't be a problem. If you have the original Avons on there, they're doing what they do best, lasting. They have no other qualities that would be lost with the long time running!Bare
I do change my riding habits based on the state of my tires/bike though.