If you run
the NV's through the calculator it also comes out as half a syn each.
The website will almost always be more up to date except when the book's only just off the press. It was a little behind at the beginning of the year while they updated the values for the new plan but I think its pretty much up to date now.
Definitely half a syn each. At the end of the day half a syn is nothing unless your inteding to eat 30 a day of them, every day?