Multiple Disc Argument - It just doesn’t work for anyone.

[Lord Flashheart]

On a large scale producing BD will cost less but for smaller less well known games that aren't going to sell as well as Uncharted it will impact them more than making the game on DVD9.
I still think it's cheaper to have multiple DVD9's than a single bluray but not by too much so the whole "it cost more to make more dvd's" argument is void to me.