Kudos to Duke for collecting and making public data about the time to degree and the rates of completion in their PhD programs. I would be curious to see similar data from other campuses. It’s unclear how many schools collect such data systematically and they certainly don’t make them public very often as the details are usually not very glamorous and can seem pretty discouraging. But it’s important information for people to have as they prepare for their graduate school experiences. It can also help students from other campuses as they try to argue for better/longer support for their training.