Description of Problem:

Generaly when you use openssh it's too discuss beetween remote servers and
sometimes with slow bandwidth.
In the standard configuration in the file /etc/ssh/ssh_config you have this option
ForwardX11 yes

It will be better to add also these two option with this forward :
Compression yes
CompressionLevel 9

Version-Release number of selected component (if applicable):
3.1p1