It's all too common. And sickening.
Since there aren't many accountability structures for Protestants, and many of them are functionally independent congregations anyhow, the data mostly isn't there for a comparison. BUT insurance payout data can provide a solid clue that there is as much or more abuse happening in Protestant circles. Probably about the same magnitude. It's just that it seldom makes the news and may never actually be made public for some small Protestant church. What newsroom cares if First Whatever tiny congregation has an abusive pastor. Unless it's a mega-church the newsroom doesn't particularly care. But Catholics have been a pile-on target for a few decades now. Catholics got creamed on this because dioceses keep records, and with a subpoena those records can be used at trials. The other reason Catholics got creamed was that dioceses, being big entities, got sued big. And of course the other reason Catholics got creamed is the tendency to hide things, a bad but natural tendency, that were already in diocesan records. You can't get much money from a tiny congregation of 50 people. You can laugh all the way to the bank suing a diocese of 100,000 people or more.
What we need more of is coming clean about this, all of it, whether it's abuse against boys or girls or vulnerable adults or just the pastor fooling around with someone he's not married to. It's good that Catholics went through this debacle. There will be some more filth (pope Benedict's term) still in the pipeline. It's good that the evangelicals are going through it. The hope is that we will come through cleansed and more attuned to our mission of saving souls. It may seem to have no end but it will taper off. We need to discover who the perps are and assist the victims.