X Axis: Successful, active, energetic, busy
Y Axis: How frequently the person is late
End result: Unsuccessful people are late for meetings, cancel, miss them, etc, frequently because they're disorganized, sloppy, etc. As you get to the middle of the curve and moderate/large success, people don't miss meetings or be late. Being late and disorganized is hugely negative correlated with success.
But here's the interesting question: Why does the frequency of lateness/cancellations go up on the high end of the curve again? I don't personally think that successful people are less conscientious; all of my experience shows the opposite, by and large. It's a popular media narrative, but seems largely unwarranted and untrue.
What is true is that people who are doing important and large-scale things will wind up with events that are orders of magnitude more important than whatever is scheduled, and thus really justifiably need to cancel. I had a good friend who is clockwork-on-time shoot me a message a few minutes before we were set to talk that he had to cancel because he had an important investor want to fund 25% of their target for a Series A round. Yeah, dude, no worries. Kill it.