Apologies, I posted before drinking my coffee. You're absolutely right.
What I meant to comment on was the fact that the menu displays when you hover, and then you have to be extremely careful to move your mouse vertically first, lest you accidentally hover over another top-level menu.
It's a question of ease of content-browing v ease of navigability. Having to click on a top level menu item would make the former slower, but would speed up the latter, personally I find the hovver-bother quite annoying.
What I meant to comment on was the fact that the menu displays when you hover, and then you have to be extremely careful to move your mouse vertically first, lest you accidentally hover over another top-level menu.
It's a question of ease of content-browing v ease of navigability. Having to click on a top level menu item would make the former slower, but would speed up the latter, personally I find the hovver-bother quite annoying.