The issue does not happen based on a strong grip. It happens with a weak grip. The "easy way" (not only way) to spot the problem is to hold the iPad with your right hand midway down the right side. Rest your thumb near the edge on the front. Your fingers on the back about halfway to the apple logo. If you don't see it just move around a little bit with the iPad. Also try walking or wiggling it.
Note that my first iPad i could just pick it up as described above and I would see it. My replacement it happens a lot less. However the problem is still there.
The Apple Store guy said it shouldn't do that. He was also shocked all the display units did it.
Note that my first iPad i could just pick it up as described above and I would see it. My replacement it happens a lot less. However the problem is still there.
The Apple Store guy said it shouldn't do that. He was also shocked all the display units did it.