I wonder what % Protestants are ex-Catholics??
It sonds like you're not aware that most protestants are catholics, just not Roman Catholics. Any church form that subscribes to the Apostles' Creed is essentially catholic, not a believer in the autonomy of the local assembly.
Baptists and other non-denominational local churches are not Protestants.
I've met a LOT of fundamental evangelical Christians who are not Protestants, those who have firmly rejected the Romanism catholic religion. Many of them are pastors or missionaries of the Baptist or Darbyite brethren ilk. Many of them are former Protestants, like me, also.
I've observed that Catholics that come to faith in Christ alone for salvation make fantastic Christians. They appreciate the grace of God and His gift, after years of guilt and the hamster wheel of works.