I've never heard Fender using "NOS" as a descriptor for replica parts. If they are, that's bullsh** marketing, because New Old Stock is a very common term that is still in widespread use for all kinds of merchandise, guitar-related or otherwise. I admit, I haven't really looked into Fender Custom Shop stuff myself, but I'd find it unlikely that Fender themselves call it "New Old Stock" when it's a new replica. They'd call it a "'62 Strat re-issue/replica neck". They don't have much control over what resellers might call it, but I doubt a new replica neck is shipped from the factory with the term "NOS" on it.
The reason this vender is calling it NOS isn't because it's a replica. It's because it's an unused part dating back to 1998. I already agreed that they haven't lied, and that I just didn't read carefully enough. I doubt it's coincidence that the "1962 NOS" is in bold typeface and the "year: 1998" is kinda buried in there, though.
It's not a fib, but it IS a marketing tactic. Nothing immoral, but still a touch of shady.
Greg