It's interesting, I made a list of all the people I grew up with around my age. Most all of them were raised in it, and the ones that weren't were indoctrinated pretty young.
The list is standing around 60% having left. Right about where the Pew poll predicts. Two of them I'm not sure about. I haven't had any contact with them in a very long time. A few of the "in" ones are nominally Witnesses - they make most of the meetings, but aren't serving or "reaching out", or pioneering. Just kind of coasting along.
Out of the rest, one is a long-term (lifer at this point) Bethelite and another is (I think) still an elder.
That's it. Not exactly an encouraging group of shining examples, even the ones that are still in.