Here is what I know... It isn't much but it is something. Last month when one of our drivers who is on the safety committee went to the safety summit in buffalo last month; the speaker mentioned that within 3 years we will be driving 6 days a week because the market is shifting and increasingly calling for it. The room went quiet when he said that; but he definitely left the impression that he had more information that what he shared.
He also said that we will most likely be at 6 days a week through peak this year. How that works with the 60 rule
Your guess is as good as mine...