They're comparing compressed text vs compressed binary, apples to apples. While text compresses amazingly well, binaries aren't 100% entropic themselves. They u

They're comparing compressed text vs compressed binary, apples to apples. While text compresses amazingly well, binaries aren't 100% entropic themselves. They usually also benefit from compression. For example, the defacto "executable" format for the Java runtime is a compressed archive (jar file).