You can also see that the "Paleo diet" search term eclipsed "vegan diet"
and "vegetarian diet":
and even "Atkins diet". There's still quite a ways to go before "Paleo diet" reaches the level that "Atkins diet" was at in January 2004, though:
Interestingly, the interest in "Paleo diet" doesn't drop off substantially after January like it does with most other diets and dieting in general:
Could this suggest that people find that the diet works, stick with it, and continue to be interested in learning more about it for a long time afterwards? Is this one of the few diets that really does become a long-term way of eating instead of just a quick-fix fad?
CrossFit has contributed greatly to the growth in the Paleo diet trend and it too has experienced extraordinary growth in interest:
1.24.13 update: "Paleo diet" was the top diet search term for the week ending January 5th, 2013: http://www.experian.com/blogs/marketing-forward/2013/01/08/the-paleo-diet-is-top-2013-diet-search/ "Gluten free diet" was also popular. The broad concept of the Paleo template is rapidly eclipsing all other diets.