I had a nice chat with Justice Greene's clerk during a break this morning, who I must say is one of the nicest clerks to one of the nicest judges I have ever encountered in the Ontario judicial system (admittedly a very small sample, but still.)
He is an older man, so I can only assume he's seen it all, and he insisted that testifying as a witness is terribly stressful. As he put it, you're all alone up there on the stand with no one at all to help you, and it is nothing compared to sitting through council meetings or marching in Easter parades.
I am not one to defend Robbie in anything he does, but rest assured, although in my opinion, he has clearly used the system to his advantage (one of the advantages of having Canada's Greatest Criminal Lawyer on your side), he is not getting special treatment, nor is he pulling the wool over anyone's eyes.
If it was you or me, we might have to go a little further to prove we were legitimately sick, but his illness and his prognosis has been well publicized and so, as a matter of course (with a doctor's note), he was let off the hook, for now.