I ran these benchmarks myself. The pgbench score just failed to run - I tried a few times but it wouldn't even start. I put it down to a bug in the benchmark. Should have explained.

But yeah, no diskio tests here really (other than the pgbench one, but I don't know to what extent that would have tested diskio). The benchmark suite tests were chosen by Phoronix. We'll do a diskio one at some point too.