I would proceed with caution personally there. I could be mistaken, but I remember reading that Moore actually outperformed polls in that SC race on the day...
Polls seem to have a tough time getting a representative sample from the evangelical Christian element in the southern states for some reason, which in my experience can lead to GOP candidates out performing polls on the day. Also, the actual polling methodology tends to be much less refined in places that normally do not produce competitive races. I would not be laying 2/7 anyway...
It's a remarkable race. I read a quote from a Republican political consultant in an article today saying Alabama 'would elect a stick of dynamite to Washington if they could... and Roy Moore is a stick of dynamite in walking form' (very badly paraphrased).