i work in the electrical distribution industry here in australia and can conform that we are in the process of physically dropping the voltage from v to v yes the change from to was only a paper change but we are in the process of physically changing transformer tap settings to alter the voltage the driver of this is that with the current v nominal system there are issues with voltages rising to problem levels as more and more solar cell installations are installed while i cannot speak for europe they seem to be having the same issues as well do a search for 'voltage rise with pv' to see what i mean