MediaPost is carrying an article about a study done by a mobile ad network called Quattro Wireless, which looks at click-through rates on online advertisements via mobile devices.
The article itself also mentions that the total number of ad impressions were the highest for the iPhone and iPod Touch.
So basically, iBlahWhatever users are more likely to click on ads, or in other words, fall for marketer-bait. QED - these folks are gullible and like to splurge on shiny thingummies. As, it would appear, are gamers, but that was never in question :-)