I included info-graphics in it because they help get the point across, plus they keep distracted reader interested in the content (who first scans the page if all he sees is text would probably run away)
This type of visual noise is actually more distracting than not providing an images at all. In my opinion, you would be better to provide images that provide visual context, and illustrate or support his answers.
For instance, in the "Opinion on Landing Pages" section you could provide a screencap of a well designed Full Sail or Webtrends landing page (perhaps with a caption or pull quote of what makes them well designed).
Also agree that infographics aren't directly relevant to the interview but they definitely are contextually relevant.
If you want break up large sections, use visual cues to break up content. Since you mentioned Unbounce, see these[1][2] as inspiration. Note the use of font size and weight, lists, whitespace and images that are directly related to the copy.
If you want more feedback, my email is in my profile.
[1]http://unbounce.com/landing-page-examples/your-landing-page-... [2]http://unbounce.com/landing-page-optimization/marketing-fail...