I actually understand where this guy's coming from.
I initially listened to the debate live on radio while I followed the FR thread. As I listened, it was abundantly clear to me that Romney was wiping the floor with Obama. I finally watched a replay of the debate on C-SPAN.com today, and I was actually less impressed with Romney's beat down, than I was just listening to it.
I think it had a lot to do with simple visuals. Obama didn't come off nearly as bad visually, as he did in pure audio. Yeah, he looked like he was tired, worn out, or something, but I honestly thought it was an acceptable performance, visually speaking.
If you want to really get the full impact of what Romney did to Obama in the first debate, I highly suggest listening to the full 90 minutes with audio only. It was devastating.
It was said that those who read the transcript of the first Kennedy-Nixon debate in 1960 thought Nixon won. As did those who heard it on the radio. However, those who watched it on TV thought Kennedy won.