Talking heads on MSNBC are sounding pretty optimistic for Dems, FWIW. At some point they do start getting early exit poll numbers and that tends to color their early coverage, but not sure if they have those yet or only in an hour.
But at some point, you can tell roughly how the exit polls (though not necessarily the actual results) are going based on how people on the TV sound in coloring their coverage.
I remember in 2004 the people on FOX were talking about how Bush just couldn't close to deal on being re-elected. That was at about 5:55.