Here is the link to the DM story http://www.dailymail.co.uk/health/article-2084550/Nicotine-patches-slow-mental-decline-improve-memory-elderly-people-study-shows.html
This helps back up the idea that nasal snuff users live one day longer than none tobacco users.
Smokers lose 8.4 years
non-tobacco users 0.0
Snuff users plus 0.01