Nokia is fair enough to have this lady demonstrate the phones so we can have an idea of how far the devices can be stressed.
At least she is experienced enough to still call this "smooth"

When we expect people to behave to accommodate the hardware and software limits of consumer devices at all times that will sign the end of evolution in interface ergonomics.

One day I have witnessed such a personality (iPhone and Symbian backup owner) using my N900 and after pinch zooming 10 times in vain -at that moment I expected the worst verdict for my N900- but she recovered from her ADHD crisis and instantly discovered the function to zoom pictures with the volume control, which is good.

But honestly - in stress situations we can't expect users to be well educated and merciful in their behaviors towards their IT related devices.

So I second a previous poster: Symbian shows his superiority in battery life. Let's not overlook this tradition of this fine OS.