Biden was spoonfed that debate and won. It was like pitting a college student against an 8 year old. Furthermore, I don't really think that what happens in his personal life has much to do with what direction he will take this country. It say much about his character and that is all good and well. Debates are not about such things but rather about setting clear positions and debunking the positions of your adversaries.
These candidates have big fucking mouths when they are mouthing off to the press and their constituency, but suddenly get tongue tied when they confront the adversary.