Rick is guessing that the failure rate for Health Month is 80% (meaning 20% make it all the way through).  I think it's higher than that, if you count the people who actually started to begin with.  Here's what I've tallied so far from what I know:

1. Me: in
   
2. Kellianne: She's out on Feb 1st
3. Rick: in
   
4. Judi: in
   
5. Ingo: in
   
6. Andy: in
7. Alice: in
   
8. Rachel H: in
9. Rachel Moonraye: in
10. Ivan: out: cheating like crazy even though he thinks he's still on it (Eastern Europeans)
11. Laurel: in
12. Scott N: in
    
13. Heather: out about half way through
14. Jenn: out on Jan 18th with drinks and Jan 27th with food
    
15. Carinna: not sure... I think still in
    
16. Ryan: in
    
17. Miranda: out on Jan 21st
    
18. Jonathan Vanasco: out on Jan 25th
    
19. Keith Butters: out on Jan 17th
20. Stephanie Durrell: out on Jan 13th

I think that's all I can glean from the Facebook group and the Livejournal community.  Who can add more to the statistics?

Current tally for success is: 12/20, or 60% success rate.  Not bad, right?  And even the people who got out early probably received a large percentage of the benefit.  I personally feel like I'm in the long tail of the benefit, but want to be thorough and see it to the end, just in case there's a secret hidden track or something.