I have no idea, because people's metabolism and bodily secretions, like sweat, vary greatly. I wash my hands thoroughly before I start playing to avoid getting a lot of junk on the strings. I have no problem with a sticky neck.
FYI: I always keep a medium size bathroom towel (WalMart $4.95) that I carry in my gig-bag that gets placed in some convenient spot as I set-up, so I can quickly grab it and run it up-n-down the back of the neck during performances. After all, most of us are not in A-list bands getting handed a fresh, tuned instrument after every song by a roadie.
It also is useful to quickly wipe the sweat off the 'ol brow on those nights when things get a little hot-n-heavy.
