Well, yes is probably not the best test for pumping through the data either.
What, by the way, is "yes"?
Try using something like IOZONE, mount the drives UDP/v2, and let it rock.
Why do you suggest UDP/v2, and not UDP/v3?
Does FreeBSD support >8KB V3 transfer sizes yet?
I regularly see 8-9MB/second on mine over FastEthernet.
On write?
Of course, the obvious things like checking collisions/full-half-duplex/ settings and all that stuff apply.
I just got a dump of all this from the fellow who started this thread, stay tuned.