Well we are actually getting better writes from tcp, which is weird due to the small overhead that tcp would have. Here is what I have currently set on a 2.8 client:

if you obtain better perf on tcp, i guess u perhaps lost packets on udp and u should then check ur network : check route from one machine to another with traceroute for example and try to examine where it could possibly cogestion or missroute beetween filer and solaris station (if u have a really wide network, it is normal to loose packets on udp so u were right to be on tcp)

The nfs ops have increased, the only thing I do see if I do a large cvs checkout the writes are intermitent. I see zeros and then I see a large write, below is an example. Now is this due to the filer flushing what it has on memory to disk?

yes this is normal, the filer cache writes in the nvram then writes in a singlke shoot on disks