The gym I work at sells personal training in 50-minute sessions. Most workouts I write take between 45 and 60 minutes to complete, depending on rest and the rep count (3 sets of 6 or 8 takes less time than 3 sets of 10 or 12, given similar rest).
I like to tell people "I sell results, not time." This is true - if you lose weight/gain muscle/get stronger/look better as a result of the workouts, I'm doing my job. If you merely spend 50 minutes with me two or three times a week but don't get them, it doesn't matter that I gave you exactly the time you paid for.
As a client and a trainee, don't focus on your length of workout. The important thing is, was this workout the training you needed today for optimally reaching your goals? If that means a short, hard workout, great, it's short. If it means going a bit longer, great.
As a trainee, it's extremely easy to pad out a workout with extras you don't need because you expect the workout to go 60 minutes. Or to cut it short and remove exercises you need to do because you only budgeted an hour. Remember the focus is on results, not on the length of time it takes to get them.