My DD "seemed" to cope well for the first - maybe 18 months. Then she had some delayed reactions. Spilt up occurred around the time she turned 4. So she was about to start a year of kindy (big transition time for her).

She's 6 now, and still has times when she will cry for 45mins after a drop-off. Still asks when mum and dad will get married, when we will all live in same place again etc. She shows signs of depression.