Skeptical about this -- especially the claim that it's "completely undetectable". One of the projects[1] we've worked on for 01.org now ships with UEFI SCT[2], which was designed to address this very issue.
Flash LUV to a USB and run the suites.. the tests will write to a folder on the USB, both "raw" and "parsed" results, so you can essentially have a log[3] of any issues.
[1] https://github.com/01org/luv-yocto
[2] http://firmware.intel.com/blog/linux-uefi-validation-project-incorporate-uefi-sct
[3] https://01.org/linux-uefi-validation