I was also born into the JW religion. But even as a believer I disliked using the term "the truth" to refer to JWism. There were so many changes and adjustments made to the JW belief structure that I felt "present truth, past truth, and future truth," would be more appropriate. So it was never a problem for me. However, I still cringe when people call JWism "the truth."
Interestingly the Laymen's Home Missionary Movement, a Russellite Bible Student group, call their monthly magazine "The Present Truth."
The term "the truth" in JWism may be a carryover from Freemasonary. Though with the Masons it is the pursuit of truth, not that they are in "the truth" as the JWs define their religion.