Not what the article states:
“This report was based on information provided by the Soviets, as the Western allies had not yet met any Panthers in combat. The Soviets had captured or recovered several Panthers after the great armored battles of Kursk and their subsequent great advances across the Ukraine in the summer of 1943.”
Yep. They had by then captured Panthers. But not at Kursk. Do not believe everything the zampolitniki and their mouthpieces tell you.
The Germans did indeed offer magnificent propaganda film of Panthers being readied for their offensive at Kursk. But the Operation Husky landings in Sicily, 09/10 July 1943 changed that; the Panthers were needed there. Desperately, as it turned out.