Mike,
Nikon states on it's 2013 website that the "New" Prostaff 5 binoculars have multi-layer coated lenses. The quote below is linked from the comments on the 10x42 P5. Product 7571.
"Multilayer-coated lenses for brighter images
Multilayer coatings, which provide higher light transmittance across the entire visible light spectrum,
are applied to the lens and prism surfaces that transmit light. This minimizes the loss of light due to reflection, thereby ensuring a more natural, clearer view." (The underlining is mine.)
This means to me at least that they are fully multi-coated because they have "multilayer" coatings on all their lenses and because all the lenses transmit light. (Does Nikon have lenses in their binoculars that do not transmit light?) This is what Nikon is telling me and everybody who wants to review Nikon's Binocular offerings for 2013. If this is a mistake Nikon should correct it.
I am not being picayune here. It is one thing for you to inform the readers of Bird Forum that Nikon Promaster 5 binoculars are not FMC on a website and another thing for Nikon to make a written statement to the world that is counter to your information.
I think you understand this.
On the matter of the lack of phase coatings on the Pro-staff 5 binocular prisms; they are in competition in their price range with the Vortex Crossfire II which, according to Eagle Optics, do have Phase Coatings along with FMC lenses.
http://www.eagleoptics.com/binoculars/vortex/vortex-crossfire-ii-10x42-binocular
Bob