How can I use the 'command-specific' simulate option in my alias with core-rsync?

#1471254: drush rsync's "--simulate" fails, reports as "unknown option" was submitted and closed since the simulate option now needs to be specified before the rsync command. However, using the 'command-option' in an alias to define the simulate option for the rsync command now breaks. This approach is described in #854722-3: Protecting a site from having it's database overwritten.. How can we accomplish this functionality with Drush 5.x?

My @prod alias (see attached for both aliases):

$aliases['prod'] = array(
  'uri' => 'www.test.org',
  'root' => '/home/testorg/domains/www.test.org',
  'remote-host' => 'test.org',
  'remote-user' => 'testorg',
  'path-aliases' => array(
    '%files' => 'sites/default/files',
    '%dump' => '/home/testorg/tmp/sql-sync-prod.sql',
  ),
  'command-specific' => array (
    'sql-sync' => array (
      'simulate' => '1',
    ),
    'rsync' => array (
      'simulate' => '1',
    ),
  ),
);

Snippet of output from drush (see attached for full commands and output):

Calling system(rsync -e 'ssh ' -rlptDzv --exclude=".git" --exclude=".gitignore" --exclude=".hg" --exclude=".hgignore" --exclude=".hgrags" --exclude=".bzr" --exclude=".bzrignore" --exclude=".bzrtags" --exclude=".svn" --stats --progress --simulate=1 testorg@test.org:/home/testorg/domains/www.test.org/sites/default/files/ /srv/www/sites/default/files);
rsync: --simulate=1: unknown option
rsync error: syntax or usage error (code 1) at main.c(1443) [client=3.0.7]
Could not rsync from testorg@test.org:/home/testorg/domains/www.test.org/sites/default/files/ to /srv/www/sites/default/files [2.64   [error]
sec, 9.03 MB]