There's no reference to weight any more in the standard. I honestly can't remember if it was 8 or 9 before, either is too light anyway. Australian rear-facing seats were tested to either 9 or 12 kgs. They are still tested with weighted dummies now but all references on forward-facing, rear-facing or boosters go by height, not weight. I do know that some of the new height marked seats are now tested to 15kgs for rear-facing. Safe n Sound have confirmed and another manufacturer too, I just can't think which at the moment. So it's a great start for Aussie kids but still a way to go. You won't find any reference to weight on boxes or in manuals though, you'll need to contact the manufacturer direct for confirmation. SnS have posted on their facebook page with the info but you might have to scroll to find an old post or ask on their wall.
Thanks everyone. I'm not crazy then. I did a quick Internet search before posting here and couldn't find any reference to what she'd said. Maybe I should sneak over to their house tonight and turn it round lol.
Bookmarks