If you are trying to prove a point about anything related to SEO you can probably find a study that supports what you are trying to prove. That, of course, is bias and it should have no place in looking at something objectively but, hey, this is SEO. If it wasn’t for opinions and stances there would be nothing to write about.
A study that was shared by eMarketer which was conducted by Ascend2 and Research Underwriters shows how B2C and B2B marketers view certain aspects of the SEO game with regard to how effective certain tactics are and just how difficult they are as well. Here are the charts so you can see how these two segments view the act of SEO.
First the B2C crowd:
Now the B2B crowd: