The size of the proton

Apparently the proton is 4% smaller than thought all these years. So I read in the Deccan Herald last Tuesday. It was a report on the following Nature paper based on muonic Hydrogen at the Paul Scherrer Institute in Switzerland. I will give a talk at our BSM coffee club tomorrow morning on this. The announcement for the talk is:

Dear all,

I will give a 10 min. talk on the paper "The size of the proton" just
published in Nature, in our BSM coffee club. CHEP, Chairman's office,
10am, Tuesday, 27/7/2010.

Best regards, Anant