So, any updates on this? From what I gather, it's like this.

Good ones that don't throttle:
EVGA (all models)
MSI Gaming X, Suprim X (implied, if Gaming X does not throttle, Suprim X should not; can anyone confirm?)
Asus Strix
Palit GameRock


Some throttle, some do not:
Asus 3080 TUF
Zotac Trinity
Palit Gaming Pro


Those that throttle:
Gigabyte Gaming OC, Eagle OC, Vision OC (replacing thermal pads fixes issue)
Nvidia Founder's Edition (replacing thermal pads fixes issue)


For confirmation:
MSI Ventus
Gigabyte Aorus Master; Aorus Extreme
Colorful
Zotac Holo! AMP


Please help us complete the list! Also let us know your ambient temps in your testings.