Brother's Quote

Here's a fairly old quote (from last week's Newsweek) by Georg Ratzinger about his brother, the new pope:

"I am very concerned. I would have thought his advanced age and his health, which is not very stable, would have been reason enough for the cardinals to pick someone else. But the cardinals made their decision, and that is the will of God."

Has anyone else commented on the "not very stable" bit?