My 5 predictions - to occur in the next 5 years

I'm going to make a few predictions.  Not because I have some special psychic power but because I can.

1. Several major studies in the next 5 years will show that it is "nature AND nurture".
2. Participation in triathlons will increase by 100% worldwide over next 5 years
3. David Letterman will not be a late night host
4. Obesity rates will begin to level off in 5 years (2012)
5. I will be happier, healthier and wealthier when I am 40 than when I was 30. 

(Happy - estimated by average number of smiles per day in any given month, Health - Best 5K time for age 30 vs. 40, Wealth - Number of way cool friends*$10,000 + Net Worth calculated at age 30 vs. 40.)

There is evidence supporting some but not all of my predictions.  It is a very interesting mental excercise.  Making predictions is fun!