Yes, it should be noted that the main Poser executable is still a single threaded 32-bit application. You need to go to the preferences and make sure that the Separate Process box is checked to make use of multi-threading and 64-bit instructions.

For the same reason, doing an Area Render will take just as long on a 64-bit multicore system because Poser still handles Area Renders internally and won't make use of the external renderer.

And yeah, Adobe is slow to adopt new technology. They've put off 64-bit and multi-threading for a long time.