Slow Tag Writing over Network (Samba)

Hi

I have recently moved my music files to another machine which is on a EXT4 hard drive on a Linux system. I have the drive mounted in my windows 7 machine via SAMBA. When transferring files I get speeds around 80 MB/s read and write. However when I'm writing a new tag to a file MP3tag seems to only achieve 8 MB/s read and 30 MB/s write. The read is slowing this down massively compared to local files and its quite frustrating. I'm assuming it's reading the file to then write it back but I'm not sure why this is so slow compared to writing or even transferring files.

There is a summary thread on Samba servers.
Samba problem summary thread

perhaps you recognize something.