Update following the first preliminary results.
Last night, the NYC Board of Elections released a preliminary IRV count. These results included several test ballots that should have been cleared from the system before counting the actual votes. This suggests incompetence on the part of the NYC Board of Elections, but it would be unfair to blame this on IRV. The revised results have just been released. All in all, they suggest that the polling before the race was generally accurate.
The first preliminary count, which does not include absentee ballots, indicates that the final 3 candidates were Adams, Garcia, and Wiley. The chance that the absentee ballots change this is virtually zero.
Garcia and Wiley are virtually tied for elimination in the round of 3. The current preliminary count has Garcia ahead of Wiley by 347 votes in this round (about 0.045% of the non-exhausted vote). In the final round, Adams leads Garcia by 14,755 votes (about 2.1% of the non-exhausted vote). (If you read my original post about this election, you might note that these results are not surprising.)
With a bit more than 100,000 absentee ballots not considered in the computation, either outcome could conceivably change by the time all of the absentee votes are counted. Consequently, both the Garcia and Wiley campaign supporters believe that they could come back and win. But the Wiley supporters should be careful what they wish for. Wiley's head to head numbers against Adams were much worse than Garcia's in the pre-election polling. Unfortunately, because the NYC Board of Elections' implementation of IRV has been one of the least transparent in the US, we have no official data on the Wiley vs Adams pairwise matchup. If we did, I think it would clearly demonstrate that IRV still has a spoiler problem,since Wiley is far more likely to spoil a win for Garcia than become mayor herself.