Probably - much like how Michael Brauer gets the credit for Bob Dylan's Time Out Of Mind Atmos mix, but the finer print makes it sound like Fernando Reyes did the bulk of the work.
Regardless of whose work it is, this TYA Atmos mix isn't anything to write home about (at least in my opinion). It's a little cleaner-sounding and less hissy than the quad, but the dynamics seem kinda toned down and the surround effect is much more conservative. For instance I miss all the crazy backwards tape and sitar-like effects throughout "Let The Sky Fall" that were prominent in the quad, they're like ghosts in the mix on the Atmos (maybe that's truer to the stereo version?).