Darcy is currently down by around 1400 votes, around 1%, with what looks like about a third of the vote counted. It's impossible to tell what's going to happen because the uncounted and counted votes are in clumps with distinct partisan leanings. That is, the counted votes are not representative of what the uncounted votes will look like. David Goldstein has the summary of what's going on.
That said, both camps should be very nervous right now. Later today, and possibly tomorrow, after more early absentees are counted, Darcy will likely regain the lead... and then over the next few days, as the late absentees are added to the tally, that lead will likely slowly ebb away. To what degree either of these predictions hold true, if at all, depends on turnout and the partisan composition of yesterday's electorate, neither of which we know enough about yet from the ballots that have been counted in the district thus far.
There's limited context around the data we have so far, and the elongated vote-counting is very frustrating. But you can read whatever you want into the data, since the poll voters skew for Reichert and they have been counted, and the early absentees skew for Darcy, and some of them have been counted. The big clump of votes in the middle is the question.