Here a drop test of the Nokia Lumia 920 is a simulation of real life situation. From the waist to the chest and finally, the ear position. The Lumia 920 is pretty much ok except for some cosmetic damage.
Here is the video from Phonebuff
Many people are complaining that the Nokia Lumia 920 is heavy. As you can see from the video, even a baby can hold the phone properly. So, I guess weight is not an issue.
The only thing that the reviewer did not do was to follow exactly the way he dropped the iPhone 5 and Samsung GALAXY S III. In the test, both iPhone 5 and GALAXY S III broke the screen. He should have just do it to see the effect.
Here is the drop test for the iPhone 5 and S III.
Based on the drop test, are you convinced that the Nokia Lumia 920 has a better built than iPhone 5 and Samsung GALAXY S III?