My prediction is that Nanos will lose his credibility this election and pull a "Zogby".
His overemphasis on citizens who won't vote, and his curious line of questioning which doesn't even list parties, are just two of the reasons. Plus, his Atlantic numbers in particular are ridiculous. Each party is seeing 5-10 point swings every night.
Having said that, many polls are in the same range, though Nanos seems to be at the top of the LPC support. It could be a very close election in terms of overall popular vote, but as we all know that doesn't really matter.
The underlying numbers on Nanos are interesting. At least according to him, and again I am skeptical, CPC is gaining significantly in Ontario, which is where this election, and its size, will be won.