Incorrect.
A former PD actually cleared this up in another thread recently. I'll try to rehash what he/she said, though I'm not great at explaining...
Though it can vary, generally, if a program tells you that you are ranked to match, it means that you are within that magic number in which a program has historically has gone down the list to guarantee match. So just say USC, in the last 6 years, has gone down to #175 on the list each year. If you are #170 on the list, you are "ranked to match." We hear it all the time in which people say they were called, but then they don't match there. This means that most likely, the program filled their spots earlier on the rank list than in previous years. In other words, USC only went down to #160 on the list. Because USC historically has gone down to 175 spots to match, they will call or email the top 175 on the list. Again, just an example.
Other programs, from what I am gathering, will personally call you tell you that you are ranked to match, but honestly, that is a total waste of a phone call. THey would have to call nearly 400-500 applicants. Waste of resources in my opinion.
The first explanation by a former PD makes a lot more sense. In other words, I agree with Frugal Traveler.