That study was posted here, I believe.
I moved the cleats all the way back on my shoes. It required me to move my seat down about 1 cm.
Has it made a difference? Not that I can tell, but I'm used to it and it didn't seem to have any downside (my knees ache after riding sometimes but I don't think the pedal position is a big factor) and so I'll leave it the way it is.
Until someone very knowledgeable posts that it's a dumb idea, at whcih time I'll slide the cleats foward again.