Long story short, P2P or not, people are pirating these days, but the P2P folks have a larger appetite for music, and that includes purchasing it in larger quantities. Nothing really earth-shattering for most of us, though hopefully it'll be a wakeup call to the RIAA and their kind.
Well, we can hope, at least.
This resonates with something I've come to realise over the past week or so with regards to my own purchasing habits. And it's not just down to "I buy what I download", although you can easily oversimplify it out to that.
If I'm listening to a lot of music, I want to buy music. If I watch a lot of Anime, I want to buy Anime. If I'm watching a lot of genre TV, I want to buy genre DVDs. This includes if listened via radio or Spotify, or watch stuff on TV or on DVDs I already own. Consuming a certain type of media makes me want to consume more, and when I'm browsing the shops just after payday, that type of media is foremost in my mind.
I don't always buy exactly what I've already watched, although I sometimes do, but it puts me in the mindset to buy something.
So whether it's via torrents or via radio/TV/Spotify/VOD/rental, if I've just really enjoyed something then see something similar on the shelves of a shop, or in an Amazon search, then I'm more likely to buy it than when that kind of thing isn't on my mind.
I buy more media when I'm consuming media. This goes for things I see or listen to legitimately, too. But it's easy to understand why some people who pirate music will also buy a lot. They either want what they've listened to or just want to buy some music.