If you read everyone's reply to my post they've all said that its not true. So hopefully you're safe.
I've ordered a 32gb anyway, it should be here in the morning. I'm going to try the formatting it first (from a Linux PC) because there's a suggestion that this might help. (and is covered by the documentation so isn't against the normal usage instructions)
There is however a much stronger suggestion (backed up by the replies to my post) that if you stick to Windows then you won't have any trouble with your S9. As I don't even have one yet, I'd believe them :-)