This is the second long-form piece about Caro and his new book I've seen this week (the other is in tomorrow's New York Times magazine - http://www.nytimes.com/2012/04/15/magazine/robert-caros-big-...). Interesting how similar the facts they tell are, but the angle is very different in each.
Great PR by his agent no doubt, but both enjoyable reads -- well worth the time to read them both.