Has anyone tried the experiment. I would but I sent my phone in for repair.
Yes, Notice while charging.
I have the same thing on mine in New Zealand. It doesn't shock you like a static shock sometimes does for example depending on what you wearing etc... With the phone facing down and charging without cover case if you drag your finger around you can feel slight vibration. I had the same thing on another phone that I had before though, which wasn't Nokia, i guess this is common? i donno.
Could this indicate a bad earth in your electrical wiring?