Re: Anyone noticed ..
From the NYT article on the subject: http://www.nytimes.com/2016/04/05/world/panama-papers-explainer.html
"One reason there may be relatively few Americans named in the documents is that it is fairly easy to form shell companies in the United States. James Henry, an economist and senior adviser to the Tax Justice Network, told Fusion that Americans “really don’t need to go to Panama.”
“Basically, we have an onshore haven industry in the U.S. that is as secretive as anywhere,” he said."
I know nothing about international finance so I have no idea how valid this argument is, but someone else did bring it up on this thread.
Also, the New York Times is very miffed that they weren't included in the global coalition of journalists which examined the data over the past year.