I don't know how much effect it had any effect on the tests, but there's an ugly problem with the sample talk page. It uses fuzzy dead images instead of live templates. It looks and feels really wrong. On immediate sight none of the "links" looked like links. The text and boxes and box-controls didn't look like a natural part of the page. It didn't look like editable native wikicontent.
Not only were all of the elements immediately dull and fuzzy, but moving the mouse across any of those elements would immediately scream that it's "dead" rather than a live native editable wikipage. Moving the mouse over live content makes the mouse pointer change to different types, it results in underlining flickering on any live links, and the link target-address flicker outside of the page in the browser-managament-zones.