Now a new survey shows the iPhone as a good vehicle for mobile ads, at least more so than Android.

The Online Publishers Association, or OPA, released findings from a survey this week that provides some insight on smartphone user behavior, including mobile advertising. The survey found that iPhone owners are more favorable to mobile ads.

OPA surveyed some 2,500 Internet users and found that 44 percent have smartphones. More than 90 percent of smartphone respondents access content on their smartphone weekly, and half access content daily. Stat of the day: Over two-thirds of smartphone users say they "cannot live without their smartphone."

Part of the reason for greater smartphone content consumption is that more people are using smartphones. Smartphone adoption has been rising at a torrid pace, and the OPA projects smartphone penetration among the U.S. internet population to rise from 44 percent to 57 percent next year, which would be roughly 142 million consumers.

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