I won't take that bet.
IMO the best testimonial on the effectiveness of EPO is still the Outside magazine article.
EPO has a mechanism of action that is entirely consistent with the effects that users report. Placebos can have very interesting and real effects as well, but I've never heard of someone experiencing instant recovery from a hard workout just because he/she believed it was possible.
That's a silly article. How can you say that is the best testimonial?
I used a keyboard connected to a computer. How did you express your opinion?
This is a testimonial, which is not science. If you are interested in science, then the links common provided should be enough evidence. If you want to work out the physiological mechanism then do a little research yourself.