The Internet scene has proven it has its own course, it cant be controlled by the labels nor the band, whats leaked is leaked and it spreads like a wildfire.
Labels could stop sending out promo cds prior to the release, but then they wouldnt get any generalized feedback and no hype built up before hand and that would collapse the whole promotional campaign.
When an album is leaked one month prior to release, thats pretty much what we have to live with, it can even add to the hype, people start talking about it, the buzz is on, but it would be nothing short of devastating for a band if it was already available six months or even up to a year in advance. Thats 100% unacceptable. When the album has been out for such a long amount of time, its already old news and will fall flat like a dead fish upon its release date cuz people have since then moved on, being excited about the current leaked releases and have forgotten about the release I downed 6 months ago since its already back catalogue priority.
Personally, I would wanna view internet (including the p2p tools) as a big radio station with your own freedom of choice to download songs and listen to them and if you like it, then you go buy the album (for the artwork, the real deal format and to show support to a band you love), and once you did that you probably wanna go to shows and buy a t-shirt too, so its all intertwined and one thing leads to another.
anyways, p2p illegal file sharing shall never ever replace an official final product, and what the final product is, should be in the hands of the copyright owner to decide
be it a digital download or a jewel case cd.