timeout param in drupal_http_request

In the $options array in eloqua_webform.cron.inc:

    $options = array(
      'method' => 'POST',
      'timeout' => 5,
      'headers' => $headers,
      'data' => drupal_http_build_query($post_fields),
    );

Can the timeout value be user-configurable? (We have some pretty complicated campaigns. The default value of "5" was timing out, however "25" did the trick for us.)

Thank you