Sound, I don't think it's correct to assume everyone on the jury are morons and can't follow the facts.
But, someone on TruTv said something very insightful that I didn't really consider. One on the lawyers said that there is no such thing as a 'fatal' dose of propofol according to doctors. Any amount of it can stall your breathing and it's the doctor's job to be there when that happens to ventilate the patient. So, even if Murray only 'gave' 25mg that amount could had caused problems given the other drugs in his system and stopped his breathing.
They even went one further and said that even if Michael self-injected, Murray should had still been there because it would have been a fairly simple task of reviving Michael if he had the right equipment. Since there is no safe amount the patient always has to be watch, therefore the amount of propofol in Michael's body is a moot point. The fact that Murray wasn't there to save his patient is the real bottom line.