Yes, we already talked about this topic weeks ago. Neogaf > Internet > Neogaf. There's a gaf thread from July talking about the same topic than the OP:I cant remember where it was but it was RAD dev that discussed the throughput for PS5 with oodle kracken, Basically it was:
21.99GB. For textures. (PS5 22GB limit)
If I remember correctly.
Cerny wasn't on drugs when he mentioned PS5 was able to load stuff from the SSD at up to 22GB/s if particularly well compressed, or when mentinoning 0.5s loading times for when streaming in-game stuff that is behind you. There's a real world benchmark backing his claims.