Chalk me up for anecdotally noticing a huge improvement when switching to the touchpad.

It's worth noting that the Apple trackpad is not only way bigger than a laptop's touchpad, it's also angled so you're not resting your hand on its edge. Also, if you've never used an Apple touchpad on a recent Macbook/Pro (the ones that are glass instead of plastic), you'll probably be surprised at how good the accuracy/tracking. They're much better quality than the Synaptics touchpads that are common in PCs.