I think that there is truth to that statement, particularly in my case. Part of my impetuous of change from theism to atheism came about due a psychological need within myself to ask myself the 'tough' questions, both about my cultural programming, and about my religious views.
Likewise the change back to theism was also driven by a psychological need to be 'honest with myself' in a purely scientific sense. I recognized at some point that I simply didn't *honestly* know in a scientific sense how I actually got here, where the universe came from, or if there was an actual "creator". There was always a psychological need there to "ask myself the tough questions" at the level of science and physics.
This self reflection ultimately brought me to a point of what I would call pure "agnosticism/weak atheism" where I really had to admit to myself that all opinions aside, I really didn't have a clue. I ended up at sort of a 'razor's edge' point where honest curiosity persisted.
There was also an 'experiential' aspect that occurred which eventually let me back to theism, but even that wasn't an instant transformation, and I've become quite comfortable with honest scientific doubt.
All things considered however, I can't rationally explain all the experiences within my own life, let alone in the lives of every other human that has ever lived, without embracing theism.
I realize that others have different paths in life, different life experiences, different "points" in the their own lives, and honest differences of opinion too. I'm simply comfortable with with works for me personally. Jesus has become an integral part of my life.
In my case, "age" certainly played a very important role in my transformation from theism to atheism. I think all teenagers naturally start to question authority, and that certainly played a part in the process for me personally.
I'd say it was the psychological need to be brutally honest with myself at the level of science that also ultimately brought me full circle. I'm not as inclined to believe that age necessarily plays a role in that process however. It's more likely to be an environmental factor, and at this point in time I'm inclined to believe that "God" was that environmental factor in my case.