Re birth date--I hit the wrong key on my keyboard by accident. 1992 is the correct date.
Re Barkin---Yes, Perelman filed for divorce first. Certainly the marriage was very troubled. The following NY Magazine article will provide the blow-by-blows for those very interested. It is an almost exahustive account. You can decide if my basic, very short description of the Meadvoy, Duff, Byrne, Barkin, and Perelman--"intersection" was very close to the mark--even if Perelman did, in fact, file first for divorce.
I think it was "close to the mark."
http://nymag.com/relationships/features/16463/