He is indeed. I'm excited to hear them, it's like christmas.
Since Grant confirmed he reuses unused tunes, I wonder if we will hear music that sounds familiar to other games. I have a strong hunch we will hear something that sounds like DK64 and Zelda. DK64 because Grant stated he used some songs from Dream in DK64 and Zelda because Viva Pinata's day 2 theme (Edison's theme) does sound reminiscent to the Zelda games... and Grant said he liked Zelda's music before.