Platter density for the new Caviar Blue 1Tb?

It looks like 1Tb for Blue series are finally out. Does anyone know the platter density for these new drives?

http://westerndigital.com/en/products/products.asp?driveid=793

Won’t it be the same as the green and black drives?  I don’t think density will really start playing a role until the 2 TB blue drives come out.