HTC has a variation on this in HTC Sense 4 where lists stretches rather than bounces - i.e. the gaps between the list elements get progressively wider to mimic

HTC has a variation on this in HTC Sense 4 where lists stretches rather than bounces - i.e. the gaps between the list elements get progressively wider to mimic pulling an elastic band that is fixed on one end. I'm guessing they do that too avoid directly copying Apple's UX. It achieves the same goal of proving a real world effect to subtly indicate to the user they can scroll no further.