better than 9MB/sec transferring from an smbclient (linux) to a Win2K Server in a Domain.

Of course I also get nearly theoretical max on NFS transfers from the same Linux machine another linux NFS server.

BTW:

3 minutes and 18 seconds to transfer a 1918MB file via smb. (WXPP.tar.bz2)
3 minutes and 5 seconds to transfer a 1918MB file via nfs. (WXPP.tar.bz2)

A lot depends on your switch equipment as well.

It's nice to know that M$ at least understand some problems with the OS they own.