I wonder if the laws are different in the USA and condensed milk doesn't have to be declared as such (or if they condense the milk themselves in their own factories perhaps there is no need to list it as anything but milk).

Reason I wonder about this is that the Japanese Haagen Dazs website lists condensed/concentrated milk as an ingredient also.
クリーム、脱脂濃縮乳、砂糖、卵黄、バニラ香料、（原材料の一部に卵白を含む）
cream, skimmed concentrated milk, sugar, egg yolk, vanilla flavoring, (Including the egg white in a part of the raw materials)
http://www.haagen-dazs.co.jp/product...p/vanilla.html