Seems as though the fizzle maybe confined to those particles containing quarks and gluons...i.e. protons, neutrons, pions etc. A new study predicted that the quantum "foam" that is producing these particles maybe confined to be within the particles themselves, meaning that empty space is just that...empty. It may help resolve some of the nagging inconsistencies in the formulation of dark energy, where the energy of the vacuum should be many orders of magnitude than what it appears to be.
http://www.newscientist.com/article/...gy-puzzle.html