Well...
First I tried both "epwing format" (with quotes) and "epwing format" (without quotes) on google.co.jp (which is the site I usually search from). Neither way results in his site being first. I then tried Google.com and typed in "epwing format" with the quotes (as you wrote in your message above). This also doesn't result in the site being first. Finally, I found that going to google.com and typing "epwing format" without quotes does make it the first result. The point is that deriding someone for not noticing the first search result is not such a good idea, because the search results vary widely depending on the portal you use and whether you use quotes or not.