Google statistics, PPC or Organic?

[David D]

Does any body know where on google people are most likely to click, on a PPC ad or a organic ad, people selling SEO tell me "statistically, people are much more likely to click on a organic ad, and people trying to sell PPC on google will say "statistically, people are much more likely to click on the sponsored ads" does any body know who is correct, I am not interested in where you personally would click, I am only interested in knowing broadly what the statistics say

Thanks in-advance