I was thinking the same thing. Their data, according to the article, indicates that over half of all functions used in Explorer are via the right-click menu and

I was thinking the same thing. Their data, according to the article, indicates that over half of all functions used in Explorer are via the right-click menu and yet they conclude that these items aren't discoverable enough? Bizarre. I think they're overlooking the fact that it's often a smaller & quicker movement to get to an entry in the right click menu than to mouse up to the toolbar and click there. Fitt's Law applies.