Board Thread:General Discussion/@comment-34954086-20130320032310/@comment-34954086-20130322092604

Wally's folks probably knew before Wally even became a superhero. Their kid got blown up trying to imitate the Flash. He's realistically probably never had a secret ID. So, Superboy moved in with them for a while with no questions so I doubt there was any kind of secrecy.

Except for Master Grayson of course.