NORC reported serious problems with record keeping at many local election offices. NORC relied on these offices to produce the rejected ballots, but county officials were unable to deliver as many as 2,200 problem ballots to NORC investigators.
2,000+ missing ballots means that a 200+ vote for Gore proves nothing as more than enough ballots are excluded from the final count.
Also, there were these tidbits:
Although trained to produce accurate, impartial reports, the NORC investigators are human and prone to human judgment and error. In particular, NORC discovered that male investigators were more likely to record marks on ballots than women. NORC also found a slight but statistically significant relationship between candidate marks and the investigators' party affiliation.
In addition, the uncertainties of human judgment, combined with some counties' inability to produce the same undervotes and overvotes that they saw last year, create a margin of error that makes the study instructive but not definitive in its findings.