Might be some validity in this. I have sometimes studied both kinds more in detail, the ones with and the ones without, and come to the interesting observation that they act differently with their phones in general. It’s like you can easily tell which ones that have cases and which don’t most of the time. Roughly speaking, the ones with cases seam to just be more casual and “careless” and the ones without are more mindful and appreciative of the way they hold and handle the phone. It’s like they actually are holding a precious thing, often two handed, and clinging on to it as it’s an important object. I’m usually right when guessing just by looking how they behave with their phone. Funny that. I do go caseless but with screen protector most of the time, but will use case when doing more risky activities, since the 3GS until the current 14PM.