Poor overclocking headroom for most Intel Comet Lake-S chips?

VideoCardz noticed that MSI discussed the overclocking qualities of Intel's upcoming Comet Lake-S processors during the company's MSI Insider livestream. MSI received a batch of Comet Lake-S processors from Intel and it appears that Core i5 and Core i7 models do not have any overclocking headroom at all beyond what Intel deems "normal overclocking headroom" for these chips. It's unknown how large MSI's sample was.

MSI has internally tested three Core series based on the batch received from Intel. According to their data, only 2% (Level A) of the Core i5-10600K(F) processors clock higher than Intel’s specifications, with the most (52% – Level B) of samples operating withing the specs. Up to 32% of the samples were considered lower quality (Level C). The Core i7 SKU offers similar quality across the batch tested by MSI.

On the other hand Core i9-10900(K/F) quality appears to be better for overclocking. Up to 27% of the samples tested by MSI were offering more overclocking headroom. After all, these are the full die SKUs, with all 10 cores enable. Some, however, may have integrated graphics disabled (the F series), but they were grouped together by MSI.