That was a good podcast, but I was frustrated that they hadn't even tried it yet on humans, as it seemed such a simple experiment. They said they will do it next, but I'd have preferred they waited a few months and then reported it (even if it didn't work on humans).
Well, as far as I can tell, the result only demonstrated a reduction of amyloid plaque in the visual cortex, so an experiment on humans wouldn't really work (you have to kill the subjects and inspect their brains for the current experiment).