That comment column on CNN that you linked didn't paint a very good picture for either Obama or Clinton.
"According to a Los Angeles Times/Bloomberg poll, McCain would be in tight races with either..." [candidate].
"McCain is statistically tied with Obama, 44 percent to 42 percent, and ahead of Clinton by six points, 46 percent to 40 percent." Considering electoral vote disposition, McCain would win over Obama.

"The poll also showed McCain with a 61 percent approval rating, a number higher than both Clinton's and Obama's in past polls."
"The Arizona senator holds a clear advantage on dealing with the war in Iraq, according to the poll, and holds a nine point advantage on economic issues over Obama ..."

"Quite capable?" Hmmm. A lot of people don't think so.