As you said - SMALL BAND. This, as WarPhalange said, is not a case for them - it's for the bigger artists like Madonna or Coldplay or the like. The smaller bands do benefit from Sharing networks but if you find a song by Madonna on Limewire or the like, you'll download it, listen to it and probably not buy the album because you tell yourself that it doesn't really matter that she is not getting a sale from you because she is such a big and successful artist. Now this is what gets to the record companies because instead of selling 10 million copies of the album, they are only selling 7 million and even though this is still a large amount of albums, it is losing the company a LOT of money (several million dollars) and this is the whole problem.
Still, I really don't believe that getting all our usage stats is the right way to go about proving that the companies are losing money ...