As for my experiences, I don't think I had a very deep physical cleansing, or at least my awarness was limited.
But that doesn't mean that some sort of cleansing didn't happen.
I think the only time that I experienced something pretty darn deep, was when after a 'Golden Dragon' attunement, I went to a sweatlodge the following weekend. Which then, according to the worthies that participated in, was pretty darn deep indeed.
It took me about 6 months to recover. It seems to me in hindsight, that maybe all those other attunements I'd garnered built up, and up, until Wham! The Cleansing. It doesn't matter really.
Anyhoo.
Otherwise, I've got nothing.
