I agree too thunder, from previous discussions.
It's tough to really know what's going on and this is strictly IMHO, I think men see more regrets in terms of their career choices, hobbies ect and "wake up" one day and think that things may not have turned out exactly how they wanted, but it wasn't all bad either. I think women on the other hand, can't separate their spouses and families from the burden they feel in being the primary caregiver and because of that, they're less likely to come back. I don't think they harbor the, I guess, romantic feelings towards their spouse, the way a man might see their wife as the mother of their children and so on.
I've met a lot of women on the dating sites that got rid of their husbands and kids and they're done. Now, there may be more WAW's than MLC wives out there, that may account for some differences. I don't have the raw data in front of me, but that's my gut feeling.
Overall though I think that returns are unlikely because not being able to process or deal with their feelings is what got them into the situation to begin with and I don't think they will face them if they don't have to. I think there's a trend in OPs, in that they're warm bodies that take the place of the spouse but they either boss the spouse, cause drama or don't challenge them much. I think either way, they just fill a need without the baggage of the original family and spouse.
I'm just widely speculating here though. So grain of salt please.