Heard something similar, maybe same company. Unsprayed for that bit of course
From the same source I also saw a compare and contrast of half a field sprayed vs not. Numbers for both were much better than the above numbers but there was a +30 bpa yield difference between what had fungicide and didn't have it. The product applied wasn't from the seed companies parent either so it wasn't a "buy our stuff" pitch.
No yield report with it but the local coop agronomist texted there was a some 102-105 day corn being harvested <20% as well.