Here's another difference between Europeans and Americans: Though Europe has been quick to embrace mobile technology overall, including texting and mobile advertising, not so in the U.S.

U.S. mobile subscribers' response rate to mobile text ads in August was 7.0 percent - compared with as high as 29.1 percent in Europe, writes MediaPost, citing a new report from mobile measurement firm M:Metrics. Only 12.8 percent of U.S. mobile subscribers reported receiving an SMS ad in August; that rate was nearly 67 percent in Spain, for example. In Europe, ads for TV game or reality shows contests draw the highest response, whereas in the U.S. ads for content downloads do.

Still, the 7 percent U.S. response rate is high compared with other types of interactive ads. M:Metrics likens the high rate to those of email ads in the early days, before the proliferation of spam.

In another mobile survey, Enpocket and Harris Interactive found that targeted ads, those tailored to users' interests, are 50 percent more acceptable than untargeted ads, iMedia Connection reports. Some 78 percent of those polled said they'd be willing to receive such targeted ads. Moreover, 58 percent said they prefer receiving banner ads on mobile web pages than mobile text ads.