The intention was to see if the article headers become easy to identify and scan (most people fixate on headings before continuing to read the actual copy). Essentially, we wanted the main points in the articles to be quickly conveyed to readers.
On one of my sites, I used a 1em "mgopen modata","dejavu sans",verdana,sans-serif; bodytext
and the headers are "hoefler text","urw bookman l",georgia,serif; (and from 1.2em up to 1.8em for the h1)
the blockiness of the serifs really seemed to bring the headers out.
On another site, body text was #333 (on #fff background) while headers were #000. This didn't stand out to me nearly as much as the huge difference in font families did on the other page. (I'll see how fast my testers find certain keywords doing tasks since the headers have most of those task-keywords)
It would seem your headers still stand out pretty well, though the equal spacing both above and below headers makes them kinda float in space. I've got a site that does that in some places and I've been thinking of bringing them closer to their text just so they "group" better.
Happy to take any questions about the particular project in the article.
You asked the testers to go to the home page, but was there any reason to naturally? Many home pages are absolutely useless (I'll point to twitter's as a good example. What exactly is the point of that page? Only a portal to the main URL, nothing more), but when there's something that's only available from a home page (like a limited offer, or a basic description of the service) then people might actively look for it or go back to it.
If you want any tips on the usability testing coming up as well, feel free to ask (the other week I sat through 20 usability testing sessions with Mums and Mums to be which was quite a learning curve!)
Thanks, this will be my first time (usability-test virgin!) and it's so darn hard to find people... more likely, I'll have questions after I make all my mistakes this first time. : )
Ordered the mike.