When I did my physics PhD 5 years was the advertised time to finish, but it took most people 6 or 7 years. The faculty/administrators who worry about such things knew it was a problem and were actively working to fix it, so maybe they've made some progress? The whiz kids at certain institutions got out more quickly of course, but that was not the norm. The programs were being accused of false advertising by not "updating" their time-to-complete numbers.