So I guess the (currently third place) "Other" is mostly PHP? I know it's not cool but it still seems strange to leave that popular and frequently used platform out of the poll.
"If, however, the variable has been used in only string contexts since it was set, and has a value that is not the empty string and matches the pattern /^[a-zA-Z][0-9]\z/ , the increment is done as a string, preserving each character within its range, with carry..."
So "0wz"++ becomes "0xa", "0xa"++ becomes "the hexadecimal representation of 10, plus one".