Did Climate Change not catch on so environmentalist are switching to a new, even more ambiguous term like Global Swing?
So terms like Climate Change, Global Warming and winter have gone by the wayside now.
Notice that Michio Kaku said that scientists didn't know what was causing the extreme weather patterns. But it didn't stop him from dropping in 'human activity' as a quantifier as to what may be causing it.
Like the Blogfather says, "I'll believe it's a crisis when the people who keep telling me it's a crisis start acting like it's a crisis."