Jedi Survivor having uncompressed textures is a speculation, but I'm extremely confident that it is this way. The fact that games nowadays ship without LOD systems, without texture compression, without adequate streaming is not just speculation. It is a fact.
By texture compression I meant something like LZ4 or Kraken on top of block texture compression, sorry for ambiguity. Of course they use block level compression. But it seems that it's the only thing they use, as I said in my top level comment.
You'll find that's pretty common since block compression already reduces sizes pretty effectively. At install time the files will be compressed further over the wire before being decompressed, so I imagine the payoff is not that big in many cases. I do wonder how much of it is that a Kraken license costs money and it takes time to integrate, though...