A very quick look at discrepancy between Needs ID vs RG data.
Just checking over the CV IDs on the most recent few hundred observations of UK Diptera, I found the following :
NEEDS ID
Correct = 41%
Incorrect = 22%
Unsure = 36%
RESEARCH GRADE
Correct = 93%
Incorrect = 3%
Unsure = 3%
A big discrepancy in % of incorrect IDs across the two groups in this context at least.
Unsure of how many of the 36% are incorrect, but my guess would be the majority.