I think he's juicing and I think others like Bautista are juicing as well. There are tons of undetectable, illegal things out there.
I have no idea. The only thing I know is that Ortiz's resurgence can be easily explained by the fact that he has finally stopped trying to pull pitches on the outside half of the plate. That and the fact that he didn't have a bad start this year, unlike the last two, explain the bump in stats. The only time his power numbers really sank was when he hurt his wrist.