I won't say it is correct or not. Personally, I can't tell what the weight is, and neither can anyone else just by looking. Empty boxes always look heavy if you are told they are heavy.
However, as many will disbelieve what I posted (and honestly, I have no idea if it is correct or not, and don't care); I would take a yahoo message board with a grain of salt too.
Need more than some poster saying Toyota legal is looking into the matter. However, I did not get this off a GM sight, it was sent to me from TN, forwarded from GM field personnel.