From a consumer perspective, what matters most isn’t the performance of the touchscreen itself, but how well a touchscreen performs in combination with its operating system and user-interface to deliver an experience that is satisfying overall. - labs.moto.com
Here's a video to give you an idea how different devices perform.
We liked these tests and were a bit shocked at how pathetic the Motorola Droid and Blackberry Storm 2 performed. Everything needs to work in concert... here Apple has the clear advantage. Software and hardware work extremely well together.