Yes, gwern's essays are what has motivated me to test these particular agents.

I'm not clear on optimal management of placebo effects. The thing is that placebo effects are still effects. And if knowing that creatine's effect is a placebo will stop me from taking creatine and thereby rob me of its benefits then I would rather be ignorant. So I kind of don't want to test it against a placebo, although I recognise that this feels suspicious. Happy to be clarified on this one.

Of course, the creatine could boos my score by making me redistribute my exertion of mental energy toward testing times, which is useless...