I imagine that to the extent kids play a role in that, LDS may hit it a little earlier because we tend to have kids earlier.
At 42, I felt in a funk, so I volunteered to go back to war and spent 9mos in Afghanistan. Did the trick, I was out of my midlife crisis. Now at 49, I feel pretty good. My wife however is a couple years younger than me and seems to be stuck in that period now.