Anecdotally, I know of one individual who has left the evangelical church to become catholic. He married a catholic. He wasn't thrilled about doing it but he was not a dedicated Baptist in the first place. One the other hand, I know a nun (now in my church), two former Catholics now going to a evangelical (non-denominational) church, my best friend who WAS catholic when we met who is now Baptist...as was his wife....AND kids...and another couple who is still Catholic but who is actually looking to become...cough cough...Episcopal. They don't count. They want some religion without the guilt. Catholic light. His words...not mine.
But again...those are just MY experiences. However, if you look at the numbers in this country...and world wide...people leaving the RCC to become evangelical far outnumber those who leave evangelical churches to become RCC. That's a fact.
True, though not as before. http://www.peacebyjesus.com/RC-Stats_vs._Evang.html