What amazes me is I thought the exact same thing, verbatim. And I hadn't thought about that boiling frog in years. I guess it scarred you and me both when we saw it.
"Boiling the frog" is a common idiom for making a negative change slowly enough that no-one reacts. It perhaps comes from the (incorrect) notion that if you add a frog to water and bring it to a boil very gradually, it won't notice.