It is much faster than humans
Also, here's an example where humans beat machines in image recognition:
http://www.pnas.org/content/113/10/2744.full
The task is the recognition of very small and blurry images. Several different models were used, including a very deep convnet.
Computers are faster serial processors but brains do more in parallel.
Parallel pipelines only really hit Neural Nets with GPU's and the Imagenet convnet solvers like Alexnet were among the 1st parallel implementations - this gave 30 - 300 speedup but still relatively tiny compared with squishy wetware.