This is such BS. I mean, sure ... perhaps it doesn't register touch when it's sitting on styrofoam or other such surfaces but really ... MOST of the time ( read: **MOST** of the time ) you are holding the phone to use the touchscreen, ergo it's grounded and not an issue. Maybe it doesn't work all of the time on styrofoam or "soft" surfaces but ... seriously? I've read reviews about the car dock and such and, TBH, I've never used a car dock and WON'T use a car dock so it's a non-issue for me.
This is from all the iPhone fanboys who have to stash something negative against the DI because it's a sweeeeeeet piece of equipment.
Honestly ... is this **REALLY** an issue? Lemme go ahead and answer that: no.