I don't think Porsche is pushing the Panamera Turbo S as a kid-hauler. I think it's more targeted at rich guys who have friends that get embarrassed when you remind them they're a Baron. Probably three such friends, otherwise our hypothetical Baron would be driving a 911.
If you believed the real problem with the Porsche Panamera is it just needed a bit more power — and not that it's a four-door Porsche — then today's your lucky day. Here's the 550 HP Porsche Panamera Turbo S.