Yes. It's strong in GPU terms, but no stronger than (some) currently-available PC workstations. At the same time it's irremediably weaker than (some) currently available PC workstations in terms of CPU, RAM and bandwidth to specialised hardware. Presenting this as a new paradigm of GPU computing seems a bit spinny.
EDIT: However, if the Mac Pro (despite the name and the heritage) is really priced and sold as something more like a high-end desktop than a full-blown workstation, then the new-GPU-centric-paradigm thing might be borne out to an extent - it would be an unusually GPU-heavy machine compared to PC desktops, if not to the workstations of VFX professionals.
EDIT: However, if the Mac Pro (despite the name and the heritage) is really priced and sold as something more like a high-end desktop than a full-blown workstation, then the new-GPU-centric-paradigm thing might be borne out to an extent - it would be an unusually GPU-heavy machine compared to PC desktops, if not to the workstations of VFX professionals.