From the photos and videos of the GOSY in-home trials one would think it was more than a couple of days. Also, there has been discussions about how much was learned by those trials. Regardless, please let us know what other robot companies have done these trials like GOSY, even for one day!
It wouldn't matter if the trial was done by a shareholder or not. The point of the trial was to place the CareBot in a real setting and observe the reactions of the family and the Bot.