I often wonder the same thing and have done some searches on that topic. It seems that quite often the WAS does indeed feel regret/remorse. Especially in cases where there was no abuse or addiction. I am sorry I do not have all my sources handy, but I have come across articles that suggest around 14% of divorced couples actually get re-married.

Like you, not that I am holding my breath, but such an admission would be welcome.

Me: 48
Ex-W: 45
M: Nov '96, together since Oct 93
Bomb: on 10-yr anni - Nov '06
OM
Separated: mid-Feb '07
Divorced mid-July '08
One daughter - 28
XW living w/OM