> It all comes down to the chipsets used in the given models.

Yes, of course, but non-support of "all pre-G4 1GHz models" would mean that none of the three 2001 Quicksilver models and only one of the three 2002 Quicksilver models get support. As I read Laire, all six Quicksilver models will be supported, with the slowest one at 733 MHz (single).