To be honest I think the only reason people say Romney won the debate is because he was much more enthusiastic and passionate then Obama was. Romney said many things that if you don't think about it sound inspiring and catchy. But if you look at alot of the things that Romney said and think about it you find that it doesn't make sense.
Example: When Obama said that "Romney is promising to reduce your taxes, decrease the government debt, increase spending on things like the military, and that his plan for doing so is to close loop holes but he has not told us how he will close those loop hole and even if he did there are economists that did the math and found that even if you closed all of them you still don't have enough money to pay to do what you claim." Romney had 3 responses to that.
1. He claimed I never said I was going to decrease taxes. Your party likes to say that and that we are going to increase the debt because that is good propaganda but its not true. (Now I remember him clearly taking about decreasing taxes in fact here is a video of him during the primary's talking about it. So he lied)
2. He said I will never support a bill that will hurt the middle class Americans. You keep saying this but that's not true. (This one doesn't even answer the question he just pushed it aside. He still did not answer how he is going to decrease taxes, decrease the debt, and increase spending at the same time.)
3. Romney's response to the loop hole was. "That is what some economists claim but others say different." (Once again he did not answer the question. He did not say how he was going to close those loop holes.)
If you actually think about what Romney said then you can see that it was Obama that should have been declared the victor. But people don't like to think. They like to be inspired shock and owed. They want some one who is enthusiastic and passionate and in that Romney won.