Normal as in, allowed by regulations and extremely usual, everyone has seen/felt it, although not everyone has noticed or understood what it is (prompting these recurring question threads).
Devices with earth terminal avoid this leakage voltage, but two-prong devices have the problem, and even many with the earth connection can be - fully legally - connected to a socket without earth connection. It sucks, and it can cause damage, but is considered normal and acceptable, like it or not.
Switch mode supplies have been able to reduce the leakage current, though. Some of the best leak so little it's very difficult to feel it.