Spanner Comparison in SIGMOD Paper

In the recent SIGMOD paper, “CockroachDB: The Resilient Geo-Distributed SQL Database”, Section 6.3 compares CRDB performance with Cloud Spanner and in Figure 7 compares the two when using “3 servers” and “15 servers”. Since Cloud Spanner’s “node” represents 3 replicas, does “3 servers” and “15 servers” for Cloud Spanner mean “1 node” and “5 nodes”, respectively?

Just wanted to reply to this for anyone else wondering, @mikesun had a discussion about this question on our community slack here.