There are some interesting points in his article, but as usual with Hersh, I think some people's agendas are given more prominence in his articles than they likely have in reality.

In the category of lessons not being learned, there's all kinds of fun in this NYT article, which has been linked in various places. For instance, Bush's apparent surprise at the massive public support for Hezbollah at a big Shiite rally in Iraq. Gee, a major show of support from Arabs for Hezbollah while they're engaged in combat with Israel--and from Shiites, no less! How could anyone have predicted that, I ask you?