n = 1 aside.
I have some large files stored in R2 and a 50Gbps interface to the world.
curl to Linode's speed test is ~200MB/sec.
curl to R2 is also ~200MB/sec.
I'm only getting 1Gbps but given that Linode's speed is pretty much the same I would think the bottleneck is somewhere else. Dually, R2 gives you at least 1Gbps.