Nielsen vs AdImpact
Every telecast where both providers published a comparable figure, and the gap between them.
Facts
Nielsen: 10,501 published figures on 9,925 telecasts
AdImpact: 4 published figures on 3 telecasts
Latest currency gaps All disagreements →
3 telecasts with a Nielsen and an AdImpact figure of the same definition
| Date | Telecast | Definition | Nielsen | AdImpact | Gap |
|---|---|---|---|---|---|
| 2026-07-19 | World Cup final | average audience · per network · full telecast · us | 38,937,000 | 31,000,000 | 7,937,000 |
| 2026-06-13 | NBA Finals Game 5 | average audience · full telecast · full telecast · us | 24,540,000 | 26,200,000 | 1,660,000 |
| 2026-02-08 | Super Bowl LX | average audience · combined · full telecast · us | 125,603,000 | 131,700,000 | 6,097,000 |
From the Methodology Where figures come from
Every figure on this site was voluntarily published to the public record (press releases, company sites, trade coverage), and every figure links to its source. A trade article naming a provider is not confirmation: we reconcile each figure to that provider's own release before treating the attribution as confirmed. Press reports often conflate AdImpact and iSpot; when we cannot tell which provider produced a number, we withhold it rather than guess. Figures we cannot fully verify against an open source are marked partial confidence. We never reproduce licensed datasets; facts, individually reported with attribution, are what the Ledger contains. When we fetch sources we identify ourselves; we do not impersonate a browser.
From the Methodology What we do not do
We do not adjudicate. A spread documents that published figures disagree; it does not assert which figure is correct. We license no data from any measurement provider and are a client of none. We accept no sponsorship from any measurement company. We publish no opinion content.