Afaik no one has gotten a Spectrum, but the hamburger still drops. I got mine pre RoS, in the 2.0 patch from a Piniata (which is the only place the hamburger will drop). The Spectrum on the other hand drops only from the purple mobs in that zone, but has yet to drop. I did over 100 runs and never saw one, and many people with even more runs still have yet to find one. Not one has posted that they have gotten the 2.0 version.