According to mobile test and measurement firm Keynote, iPhone users are frustrated with the mobile portals for popular news sites. The study was conducted with over 75 participants who were tasked to find an entertaining news story, read a news article, and search for a story on a specific topic and send it to a friend.

The study found that satisfaction rates were low for Yahoo and Fox News at 51% and 64% respectively. Only 4% of the users in the study clicked advertising, the others noticed it but didn’t click. Yahoo users reported frustration with the site 60% of the time and Fox News users reported frustration 33% of the time.

“The iPhone is a breakthrough mobile smart phone,” said Dan Richards, senior product manager at Keynote, “but our Keynote WebEffective study shows that the user experience of surfing Web sites is not.” Richards went on to say, “There are some areas of usability that need to be perfected for end users to be fully satisfied. Mobile Web designers are having to learn and adapt to a brand new world.”

Via Keynote