@kingCyrus, those are excellent points you raise.
As for the 400EVs, I should have said 350 actually. 400 is out of reach. However, here's the scoop. Something like this:
http://www.270towin.com/presidential_map_new/maps/7nA0O.png
Slate is running both models of the early vote and releasing real time exit polling. *If* that's reliable and *IF* trends hold, which are two big ifs, then Clinton may be having a very good day. As a rough summary, per Slate, in the vote so far, Clinton is running ahead of Obama in Iowa by some minor miracle. *IF* that is true and holds and Clinton wins Iowa, is running ahead of Obama's margin in Florida, Nevada, PA, WI, then we're quite possibly looking at a situation where the historically large number of undecideds and third party voters (still close to 10% of the electorate) would be breaking sharply for Clinton.
Remember, 538 has been talking all election season about the high volatility especially in light of the historically high proportion of undecideds (over twice as many in 2008 and 2012). That means that a lot rides on whether they split, break for one candidate, or stay home. 538 has repeatedly said that a Clinton blow out is as likely as a Trump win. So, what do the early few tea leaves we have suggest? They suggest that Clinton is having a better run right now that the polls had predicted.