Usage and limitations of sponge functions for PRNG
I'd say the comparison table is not a fair one, as it compares the Infinite Noise generator's throughput when feeding bits into a CSPRNG (Keccak) running on the host workstation and then running that CSPRNG as fast as the workstation allows. Other devices in the table achieve ~10 Mbit/sec speeds, but all of those devices in the table which had enough design documentation published on the web seem to advertise their throughput based on whitened output, but not on output expanded via a seeded CSPRNG on the host. 

All of this is “much ado about nothing” however. A single 256-bit seed and a fast-key-erasure CSPRNG is all one should ever want in the real world. Don't create a persistent channel for attacker-controlled input. Or just use /dev/urandom.