Why would you assume that a temp job at an advertising company would be "more advanced" than work conducted at an actual research institution?
Comcast isn't just a cable company these days, but it is still a cable company.
They also created the most power NN processing silicon that uses far less power than anyone else. A pod is doing 11.5 quadrillion FLOPs is pretty impressive. Just sayin.
It's not even the kind of fundamental research that places like Xerox PARC, IBM, or Bell Labs used to invest in.
Frankly, it's kind of insulting to imply that a one-year Google residency would be "more advanced" than years-long graduate programs at places like MIT, Caltech or CMU.