I have never read "60%". But I have read that of first marriages, quite a bit less than 50% fail; what brings up the average of failure is the fact that those who divorce and re-marry often divorce and re-marry again, sometimes several times.
When I was younger, before I was married, I used to have an unspoken rule that I did not want to date girls from divorced families. It was not a hard and fast rule, but I think is has some basis. One girl I dated had both parents on 3rd marriages. Her idea of sticking it out though tough times was not quite the same as mine - and how could it be, you are a product of your upbringing.