In my experience it approaches 100%. Maybe 95%, with the other 5% usually actively LOOKING for someone else.
This is why I believe MLC should be treated primarily as an infidelity problem first. Until the OM/OW is out of the picture, there is really very little chance for any meaningful reconciliation, and even MCing isn't effective.
Puppy
There is very little chance of reconciliation, period. Remember this, people are not going to admit they have done wrong. Very few times does that actually happen. People who go through this would rather live miserable the rest of thier lives than admit to you, me, or anyone else that they did wrong.
