Hi,
I've just tried that (-o rsize=65536) and it's even worse.
I've just noticed that for long files it eventually generates a read
error. So effectively, it's slow and it doesn't work.
Maybe I've my nfs share is not configured properly ?
If you are able to run wireshark and capture the nfs packets, it
probably will shed light on the issue...
I use "mount_nfs -v -o rw,rsize=1024,wsize=1024,retrans=10<PC-IP>:/<path_to_folder> /nfs/<folder>"
for connecting to Ubuntu-Linux PC, works good.
You can use "tcpdump" package from sparemint site for logging network traffic on Atari/MiNT, too.
Lars