That's what they say but I think they were hedging their bets a little. When my G4 died I wanted to record a TV show while I was out with my Macbook Pro so I tried my B&W G3. It did the job
Admittedly it was a rather tricked out G3 with 1ghz processor, USB 2.0 card and serial ata card with a 500 gb drive. But it ran the EyeTV software, recorded the show and played it back.
Wayne