Again, it depends. The mere threat of hurting me or my loved ones would be enough for me to tell you anything you want, and accurately at that.
The reliability of torture (again, distinctly from its morality) depends on the questions, the victim, etc.
First, please keep in mind that I said that torture is a very poor way of collecting data.
Second, I expect that if you (or just about anyone) were actually faced with a situation where they were about to be tortured in order to provide some data that was needed by a hostile power, then that person would resist far more than they would initially believe that they would. At least that is what has normally been the case.
Third, I find it quite instructive to actually study how torture has been used to obtain data.
In the case of World War II, for example, lots of people were tortured in order to obtain information, and that information was normally obtained sooner or later.
However, people with really critical data were normally quite successful at holding out for at least 24 hours which gave their friends enough time to get clear, alter their plans, change the codes, and so on.
Furthermore, when new data is collected via torture, then the data has to be analyzed, verified, and then finally distributed to the appropriate people for appropriate action. And by the time all of these thing occur, then almost always the data has lost its value.
Accordingly, the use of torture is actually a very poor way of collecting data.