I agree that PS5 shouldn't see any drops to anywhere near 9.2 TF, but I think part of the push in people saying that is because essentially, PS5 is the Oberon chip the Github leak and testing data showed the entire time. And we have evidence that at some point the chip was at 2.0 GHz, and continuous revisions were done at that speed.
We now know why: Sony wanted to push the clock to as high a rate as possible and sustain it at that rate. So basically the system is running in a continuous, constant Boost Mode. The worry here (for me) is how expensive the cooling system will be, because combine that with the custom NAND flash memory controller and embedded (but removable) SSD, and the PS5 might actually cost about the same cost as XSX in terms of MSRP.
And I stress that because it seems like MS will price-match the PS5 while trying to avoid MSRP above $499. Comparatively, PS5's BOM is at least $450 (likely more), and the company is debating whether to sell at a profit, at-cost, or to take a loss. The fact they've deactivated 4 CUs for improving yields kind of tells me they aren't aiming for an at-profit MSRP. The Japanese side of the company seems to be pushing for selling at-cost, while Jim Ryan seems like the kind of guy who could lean to selling at a loss (he's particularly sensitive to parts of Europe in terms of console pricing) or at-cost. Given his background he'll probably side with the Japanese side on this and therefore I can honestly see a $499 PS5 and $499 XSX.