I am reaching around 70mbps transfer rate.
Just created a new share. Then I set the share permissions to allow anyone to read and only administrators to read and write. Then I tried to copy something into the folder. It showed an error, no rights were granted and to try again. This error went away when I restarted the computer. I suppose logging off and in back again may work as well. Basically information like this I put in over all the reviews as this problem would probably effect this system as well.