Thank you for your insights. I probably jumped the gun with this charger...but now I'm more or less all in.
Seems kind of silly. It's microprocessor-controlled so I would think the pulse desulfation would be a no brainer...so long as they took the time to learn that it is the proper way to do it.
Perhaps, they decided to "keep it simple" in those videos and it really is pulsing and they didn't want to confuse the common folk with such engineering minutiae. Pffft, I don't know. But I'm gonna try calling them to find out what the skinny is.
So, the latest on my experience with the Noco Genius is that, after the 3rd round of desulfation (each "round" is 2x iterations of the approximately 4-hour desulfation routine), the battery measured 12.6 V after ~16 hours removed from the charger. This compares to: 11V after 9 hours for the 1st round of desulfation; and 12V after 9 hours after the 2nd round of desulfation. So, in this basic no-load test, there appears to be incremental improvement. But for all I know the battery might be more or less ruined by now.
I am doing one more round and that will be it. Probably Wednesday, the 2nd stage of the test begins...actually driving the damn rig and seeing if the battery functions with anything close to normality.