I can believe it. On the XPS 13, even when modifying or NULLing the master password on the internal sata drive, the unit's BIOS will reassign the BIOS (UEFI) admin password as a valid SED drive password, with no user intervention.

It's really just an 'in case of (casual) theft' level of encryption as far as I'm concerned. Good enough on the systems I'm using it on. For everything else, there's LUKS.