The day I took delivery, I also swung by the local SC - ended up seeing a charge of like $6 on the screen afterwards. Since then I've charged for real a few times and it always show 0$. Might be just a bit of lag in the system. I don't recall ever seeing that $6 show up anywhere on a CC statement (but honestly, doubt I would have noticed).
Edit - got curious, checked a couple on statements, and don't see a single SC charge.