Okay I'll try and tell you a story now, lol. Bear with me if I get the wrong end of your stick or go off topic or something - I'm known to do that quite often.
Once, when I was young, I had this girlfriend, who I had met online, funnily enough. Well, I met like three girls at once actually, and I hit it off well with all of them, but this girl asked me out first, and I said yes. I was new to relationships back then, lol, so I was actually swept off my feet.
During this time I got to talking to the other two, and I realized that one of them rocked, one of them was...strange, and the one I was going with wasn't really my type of person. But I'm a nice guy and I didn't want to break up with the relationship, and I was also generally too frightened to ask the girl I liked out, in case she took offense or said no, the crushing pain of denial.
Anyway...the girl I was with at the time, decided to stop really caring and started ignoring me, even going as far as to simply respond with 'k' or similar, and stopped talking to me as soon as she came online. I was getting tired of the relationship, and then one day when I signed in she invited me to a conversation with another guy, and revealed to me for the last two weeks (we'd been 'together' like three months) she had been enjoying spending time with her real boyfriend, who up until two weeks ago had been spending time in prison for assault.
Meh. Long story short, she decided to dump me there, with her boyfriend adding sniping comments. I won't go on about what was said, but I didn't go out politely, I'll tell you that. The last thing she actually messaged me was 'Go away!' and I responsed with 'Gladly!' and then..that was it. I cut all ties, except the fact she knew my mobile number.
Then I started up a relationship with the other girl, the girl I am now engaged to and in love with more than anything. She swept me off my feet, and I gave her butterflies, and our relationship just blossomed. But that is talking of the present.
About two months into my relationship with her, the ex started texting me with messages about 'being friends' again. I unblocked her email adress and sent an email, not willing to add her to MSN proper, again. She informed me her boyfriend had gone inside yet again for assault, again. Course, I'll never know if she was simply trying to hurt me, but I was nasty back to her and said, pretty much, enjoy the pain you are in, because it's what you deserve. She had hurt me pretty hard, at the time, anyway.
Hmm. So I'm guessing it is very possible for the dumper to be worse off than the dumped, when it comes to break up. I'm a living example...I think so myself, anyway. :)
I hope I got your question right, lol. Hope it made sense, too. :)