Got a hold of Cyberstorm MK3 (060@50MHz), benchmarks get way better:
NETIO - Network Throughput Benchmark, Version 1.32
(C) 1997-2012 Kai Uwe Rommel
UDP server listening.
TCP server listening.
TCP connection established ...
Receiving from client, packet size 1k ... 947.98 KByte/s
Sending to client, packet size 1k ... 659.21 KByte/s
Receiving from client, packet size 2k ... 1057.02 KByte/s
Sending to client, packet size 2k ... 895.88 KByte/s
Receiving from client, packet size 4k ... 1119.78 KByte/s
Sending to client, packet size 4k ... 1269.84 KByte/s
Receiving from client, packet size 8k ... 1183.08 KByte/s
Sending to client, packet size 8k ... 1380.43 KByte/s
Receiving from client, packet size 16k ... 1212.76 KByte/s
Sending to client, packet size 16k ... 1411.63 KByte/s
Receiving from client, packet size 32k ... 1207.01 KByte/s
Sending to client, packet size 32k ... 1427.19 KByte/s
Done.
That is very good transfer rates with the 060 :-)