This is the tpu v2, and it was most certainly not released internally when the K80 was.
Re:2080 Ti TensorFlow GPU Benchmarks
by deepnotderp on Friday October 12, 2018 @02:13PM
(#18203436)
You're talking about the tpu v1, not v2 or v3, so no.
Also, there's no need for assumptions when you know what's going on in the design team.
In this case the data was from the time Google introduced the TPU internally, when the K80 was very much up-to-date. It also makes sense because the K80 was the only GPU offered in GCP.