I think that's a fair takeaway specifically because you are careful to limit the scope of your comparison to Calvin and Spanner. If you were to replace "Spanner-like" with "partitioned", I'd push back that it's not as clear Calvin is better than non-Spanner partitioned systems, even when you have mostly multi-entity transactions.

EDIT: To be clear, when I say better I mean higher throughput and lower latency.