Of 293 organizations measured across 20 industries, just 6% earned Excellent (above 70%) trust ratings.
Comcast had the lowest customer service rating of the 233 companies measured, while USAA took the top spot for the second consecutive year.
Satisfaction with providers has dropped to a multi-year low.
Google remains the largest media company in the world.
Retail remained the top spending ad category, but growth in Q2 2013 was minimal compared to a year prior, at only 0.1%.
The top 10 US advertisers accounted for an estimated $3.74 billion in ad spending excluding online advertising, or more than 10% of such spending in Q1.
Google stands alone at the top of the list, with an estimated $37.9 billion in revenues, more than $10 billion ahead of its nearest competitor, The DirectTV Group.