New light shed on quark bags in protons?

Recently, an article came out talking about findings from analysis of data from particle collisions. It suggests (with some error) that there is a low probability for protons to have charm quarks in their bag (instead of up quarks im assuming). This is interesting if found to be true. The main differentiation between protons and neutrons are the combinations of quarks uud & udd respective to the order. Being that the is low probabilty of havin a stable configuration ucd to build protons thats pretty strange. Pretty cool stuff dood. Figure it out