Just to clarify for those who don't know: the difference between OST and in-game is lossless 44.1 kHz versus lossy (1:4) 22.05 kHz. For those who like ToL music the ToL drama CDs should be worth for the better music quality alone.
Exactly right. I can only assume this was this to accommodate the obscene amount of spoken dialog in the game (at least for the Japanese version). I'm interested to know more about the CDs.. I really don't care for voice dramas, but how much of the CDs are music tracks from the game?