Dual ported "E card" performance

On a dual Xeon, the user sustained uni/bi-directional data rate for the
dual ported "E card" is quoted as 495/950 MB/s.

http://www.myri.com/news/03a14/

This rate was for a GM 2.1 microbenchmark.  Are there perf results for a
GM sockets application or netperf unmodified on the "E card" - including 
throughput, cpu utilization, and latency ?  

I am assuming you can assign one IP address to the dual ports.  Will
the packets be distributed across both ports if TCP streaming to/from
another dual card with a single ip address or TCP streaming to/from two
other clients each with a single port "D" card using Sockets GM or just
tcp/ip ?

-Bill