But then they said 250/second when running multiple inference? Again I don't know if their assertions about running multiple inference are correct but why focus on the wrong number instead of addressing the actual claim?

250/s is still nothing when compared to an actual NLP pipeline that takes a few ms per it, because you can parallelize that too.

I know it's hard to understand, but you can achieve a throughput that is a few orders of magnitude higher.

250/s is few (4) ms per it