Well, the deal is that the NT neck was originally designed to eliminate the problems associated with joining the neck with the body. In traditional guitar building the neck dovetails into the headblock and then the fingerboard is glued down. So there is always a hump at the 14th fret. Check it out. Most guitars have fretbuzz at the 12th through the 14th fret. Check out the info and the video at
Taylor's website.
The NT neck does resist more problems associated with humidity. But the neck is not the part of the guitar that suffers badly from dry and wet guitar symptoms. The best defense against these problems is to just be sure to keep your guitar in it's case when you're not playing. But good preventative measurements can be taken very easily. Check out the
Tech Sheets collection at the Taylor website.
Also, you might be interested in a vido of Bob Taylor called
Understanding Humidity. It's all pretty fascinating stuff!
Yes, yes, I'm biased. I own a 714ce.
Unfortunately, it's a 1999 and pre-NT technology! But trust me that even pre_NT Taylors don't have that hump at the 14th fret!
Steve