In my experience the more variable argument often comes last, presumably for easy reuse. For example...

  $chown user1 file1
  $chown user1 file2

  $ln -s file1 file2
  $ln -s file1 file3

...seems more likely than...

  $chown user1 file1
  $chown user2 file1

  $ln -s file1 file2
  $ln -s file3 file2