Shortfuel: I like it when you say "it is almost impossible to get a TOO LOW TERRAIN warning" however that is exactly what I received years ago on short finals to the newly opened 18R(?) at AMS! The runway was in the MCDU database but presumably was not in the EGPWS one! Warning was triggered at about 300ft. IIRC. I am still of the opinion that a G/S warning is quite likely though on several of the sidestep airports that I can think of.
Cheers