I'm firmly in the camp that wants and enjoys the full 60 minutes. If it's really going to be 45 minutes, then as several have said, say so up front and stop saying "I'll make it up next time". One time I can forgive, two-in-a-row, forget it. Yep, I'm that dude who enjoys the final "6 minute and 30 second foot massage", although in my case I'll usually turn back over for more back and shoulder work. It often makes the difference between a good session and a great session. If the session goes to 70 or 80 minutes, I'll almost always reward it with a slightly bigger tip and/or a promise to come back soon, which I will be happy to keep.