Also, most of the sites that listed the Five29 for sale when it came out are still showing it in stock.
I thought orange's were pretty closely built to order (you can chose, colour, spec etc), so "in stock" might mean one on the shop floor that's for sale, but most people order one with a didfferent colour, or components so the original one stays in stock for a while (if it ever existed). Compare to spesh who do one model, one colour, if you want a different spec/colour then tough.
They're also a relatively small company (compared to Spesh, trek or Giant who'll fly the worlds bike journos and hundreds of bikes out to somewhere sunny for a week) Ornage probably have one demo bike that has to be passed through Dirt, MBR, WhatMTB, MBUK, Singletrack, demo days, etc. The lack of any magazine testing might mean their productions full and there's not time to make one for MBR. Demo bikes for mags are a double edged sword anyway, if it's selling well then why risk it coming 2nd to the new Spesh (this is MBR after all) and potentialy loseing sales. Whereas if it's not selling well you'd expect reviews, interviews and factory tours to be cropping up in every magazine as the marketing group/person gets it as much exposure as they can. Note that there's often a spesh a giant or Trek and two brands you've maybe not heard much of (Corratech, Nicolai, Oreba, Merrida, Cube) in a lot of MBR group tests, its not because MBR have selected the 4 best bikes, it's because Spesh and Giant can afford to loan bikes out and the others are deperate for exposure, the Nicolai will be slated for costing a lot, the Oreba for being too euro, but it's much needed exposure for the brands.