Are there any data to support why this might be the case? Indeed there are. I've been doing 30 minute workouts five times a week. After I manage to put on the +1 reading glasses, the electrodes, the HMD, and earphones, I yell at Alexa and tell her to set the timer for thirty minutes. After the thirty minutes are up, I write down the score. Almost every day the score has improved by a non-trivial amount. Here it is.
Dr. Tran said that I should do the exercise at least five times a week. I decided that these two days off are probably a very good idea. That's why there is nothing on the 21st and 22nd.
Here's what that looks like plotted out. Doesn't look like much, but it should look more interesting as time goes on. I have to say, I am impressed at how quickly things seem to be moving along with this protocol. Hopefully this slope continues course.