function is_current_site_multi_user()
{
$users = wp_cache_get('site_user_count', 'WPCOM_JSON_API_Endpoint');
if (false === $users) {
$user_query = new WP_User_Query(array('blog_id' => get_current_blog_id(), 'fields' => 'ID'));
$users = (int) $user_query->get_total();
wp_cache_set('site_user_count', $users, 'WPCOM_JSON_API_Endpoint', DAY_IN_SECONDS);
}
return $users > 1;
}