Ras apparently show Obama ahead by 5 today
I think there is a lag...we saw it back when Obama's lead collapsed nationally but he was still leading in state polls. By the time McCain's national numbers began to fall around Sept. 11th or so...McCain's state numbers peaked at their highest.
This race has been tightening, and the state polls should respond by Monday/Tuesday.
Possibly (though 538.com showed that the idea of a 'lag' doesn't really hold true - make of that what you will). However if there is a movement back
towards Obama (as Gallup showed yesterday and Ras today) then by the same reasoning, this movement won't be picked up until after election day, which being impossible means they would show up when the results come in.