It appears that it is simply a matter of definitions. If one were to actually label only those from reformation “protesting” denominations as protestants, then “protestants” would have not been a majority for a long, long time.
As long as one labels protestant as pretty much anything that is Christian but isn’t also Catholic, then protestants are still in the majority.
The problem, of course, with any group that “starts itself” is that it isn’t connected to a demonstrably historic lineage that goes back to Christ.
Agreed. And it is not only a matter of secular people classifying groups. If I'm not mistaken, there is a whole group of Baptists who would bristle at the thought of being considered "Protestant."
The key point from this study is that those who either question or absolutely do not believe in the existence of God is growing. And that should concern all of us.