No, not yet. Stay tuned for a report by Joseph Holmes though , as that would be the best place for reporting when it can be done.
What is usually seen is gamut extensions, not the same thing as gamut largeness. The additional primaries makes for some extensions into the areas they can go where no multiple inks can, but don't create overall gamut. This is fine tuned in the color maps where the ink is added, the tapering of the combined inks etc. There is no doubt that the new printers will be well done. It will be interesting to see how close the three brands will be able to achieve spot colours now.