I installed 3.16.0 on the Glo HD, and it's a bit faster on the initial page turn, but still not as fast as it should be, it's still much slower than the regular Glo on 3.12.1. Once it gets going and you keep turning pages, then the Glo HD is faster than the Glo, which I would think that's how it should be for the newer reader.
Now to wait for the patch so I can kill the huge line spacing!