VPN port speed

The fact that you see that its only conneting at a speed of 9600bps, dosnt mean that the actual speed is 9600bps.
Please look up Microsoft KB article:
Q263614
or:
http://support.microsoft.com/support/kb/articles/Q263/6/14.ASP?LN=EN-US&SD=gn&FR=0&qry=vpn%209600&rnk=3&src=DHCS_MSPSS_gn_SRCH&SPR=MSALL
remove all spaces.
The fact that you expereince slow connection has nothing to do with the server side. Its because your clients connect to the internet thru Dial Up. If they connect to the internet thru DSL it might still be slow but you will see that its not so slow as on a dial up connection.