I know what the ideal gas law is.
Read this report. It explains what really happened and why the Wells Report is wrong in its assumptions and its analysis.
http://www.aei.org/publication/on-wells-report/
Nope. Even assuming that one set of balls was left in a room heated to 80 and the other left outside in 40 degree weather, the temperature variance between indoors and out cannot explain the pressure differential.