[THIN] WAN links and farm

We've recently moved our servers into another farm. The datastore and license 
server reside across a T1. We are all running Windows 2003 with PS 4.0 Prior to 
the switch, we ran on the same servers in our own farm. License server was 
local, datastore was local. Since the switchover, application launching is very 
slow, even movement within the app is very slow. 

Obviously having the db store and license server on the same LAN would be 
quicker but should it make that much of a difference? How much data and 
communication is going on across the WAN link with server in the same farm? 
Servers seperated by the WAN link are in different Zones by the way.

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