it's not entirely surprising. Hilary is very popular. I'd bet Jeb would be more popular in TX or Montana than he would be in Florida.
In a national race, I'd have to bet on Hilary, but I think jeb would keep it much closer than a newbie like rubio or Christie.
And in a national race, you just never know. Obama was ENTIRELY beatable, with a dozen reasons why he should have lost. The repub option Romney was just that much weaker.