That's a good point because some singers actually do that, read the lyrics while singing, or at least keep an eye on the lyrics in case they forget something. But Rob? No I don't think so, he writes his own lyrics and somehow I just think he remembers every word in both old & new songs.
But If they would ever perform the whole Nostradamus in concert, then maybe Rob would need some help with the lyrics. And I would like to see that by the way, Nostradamus is a heavy metal opera and it should be performed live at least once. Like most fans I like British steel more than Nostradamus, but I still think that hearing the whole thing live would be awesome.