One could probably develop a formula that gave a number value to such variables as family structure, education, current age, age of coming into the borg, past experience with religion, economic situation, etc., then put it on a graph along with the trajectory of the WTS' "present truth" and come up with some fairly accurate indicators.
If the WTS is in a downswing, such as right after the 1975 debacle, or the child molests, etc. or in an upswing such as capitalizing on tragedies like Katrina, that would have an effect on individuals who are disposed to be swayed by such.
Interesting notion and with enough information gathering, I do believe it is possible to make predictions for individual responses as well as trends for larger societal groups.
It would be vital to have a thorough understanding of neuroses and the concept of cognitive dissonance, as well as algebra.