Serious question - looking at the graph, it looks like the disparity between U3 and U6 jumped quite a bit in 2009 and is just starting to get back the historical difference today. Do you think it was valid to be concerned about the disparity increasing by so much in 2009? That part does strike me as a little worrying, though it is coming back in line now, which seems good.
Steep changes in the slope can introduce visual distortions when you compare the gap between two series. If you download and plot the difference, I think you'll see less of a change.
