I'd agree with that partially. Generally, the reaction experience starts from a linch-pin doctrine suddenly being overturned in your mind by a flash of truth. Its like someone kicks your legs out from under you. In my case, it was a sudden blinding understanding of the Immaculate Conception and then a realization that Catholic Mariology in general was true because of a few simple words in a talk from a Priest about Genesis and the Fall.
After the shock of this sudden awakening wore off, a second one came along a few days later, with me realizing that with True Faith, I now had the power to conquer my major sins. So I stopped, cold turkey, the profanity, lies, and lust, I had been a slave to before.
"Who by faith conquered kingdoms, wrought justice, obtained promises, stopped the mouths of lions, quenched the violence of fire, escaped the edge of the sword, recovered strength from weakness, became valiant in battle, put to flight the armies of foreigners." (Hewbrews 11.33-34)
Do you consider this sudden awakening a conversion experience? Sure reads like it.
Oh, and Hermann makes a very important point that understanding one simple fact can be key to understanding a huge body of knowledge. This applies whether the subject is physics or Christian doctrine.