This tip will make the nero show the actual speed.

  1. Create a text file (*.txt) and rename it to "ShowSingleRecTurnOn.reg"
  2. Edit the file and insert

REGEDIT4
[HKEY_CURRENT_USERSoftwareaheadNero - Burning RomRecorder]
"ShowSingleRecorderSpeed"=dword:00000001

  1. Save the changes and double click the file.
  2. Accept registry change...done!

NOTE: You should use the ShowSingleRecTurnOn.reg file EVERYTIME you (re)install Nero.