If the JW's had the true religion, wouldn't God make a priority to answer their prayers, and make sure that these people knew that it's God that gave them what they asked for, not just a simple cooincidence.
I suppose you could say the above about any religion. Jehovah blesses anybody who lives their life by His righteous standards. You can be a Hindu, Baptist, JW, Mormon, Muslim, etc. it doesn’t matter. The blessing comes from living by God’s principles. Look at the blessings a person enjoys by not practicing sin; better health, longer life, a productive life with material rewards, avoidance of illegitimate children, the respect of others as well as self and on and on…
Does God answer individuals prayers? I’m convinced he does when he wants too. Why does God not answer all prayers? God is not some mythical Santa Clause who exists to fulfill our every request; therefore he answers our prayers as it suits him. After all, who is the potter and who is the vessel?