Well, it still ruins the essence and feeling of closure you get when buying a whole album. I hate leaks, cause they ruin it for you. That perfect scenario of getting the album, after waiting for months, and enjoying it as a whole gift. Complete... The fucking cover, the lyrics sheet, the artwork, the feeling you're up to listen to it AS A WHOLE, and you know you've supported the band you love.
Not only the leaks bother me, but the pre-releases like Porcelain Heart and The lotus eater. Two amazing songs, that have been spoiled for me (I couldn't help myself but to listen to them)
Listening to songs as singles isn't the same. But that's a matter of personal preference. The leaks are absolutely wrong.
Just like easy sex isn't as gratifying, so are easy leaks.