See this article about Chassidic “atheists”. I don’t know how true it really is. Ironically Centrist Orthodox (e.g. YU) are accused of becoming more Chassidic as witnessed by the employment of the Aish Kodesh, Rabbi Moshe Weinberger (a Rebbe with an MA and MS) as Mashpia at YU. I read an article about that phenomenon when I was in NY. I’m told davening in his Shule is a real experience.
pitputim 
people move between affiliations all the time, especially in our civil societies, secular become observant , modern orthodox become charedi, charedi and modern orthodox become secular.
That is the real world
The demarcation lines of religious classification are also becoming more and more blurred.
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