I did some googling on the topic, and half of the websites say that the DVX actually records at 23.98fps to comply with NTSC standards, since the signal on tape is not a 24P stream, but rather your standard NTSC signal consisting of 24fps with 3:2-pulldown.
However, other websites claim that the camera actually records NDF in order to "comply with 24P standards," whatever that means.
Now I'm just confused. But really, would it make all that big of a difference capturing a NDF signal with DF settings? I haven't really looked into it since it's not a problem I've had to deal with.