I was at an Apple store yesterday, just behind a teen who was puzzled why her phone was out of storage space. Turned out she had 9 gigabytes of texts stored - dominated by full-resolution pictures. So yeah, as we're moving into 10-40 GP imagers on phones, people are casually and regularly sending around enough data to start including a lot more visual information than they expect. Social media sites may take a while to catch up, but "texting" is already hitting that resolution.