hi
For long remote client copy - there could be several things :
a) Please check if there is any issue in the DB level - which database are you using - check db2diag.log ( for DB2 ) and alert log file ( for Oracle ) ..
b) For the Test system - please check if there are any CPU issues .. or file system space issues.
c) Also is it taking a long time for any specific table ? Is it possible that there has been a large space increase in the PROD system ...
d) Hope you are using parallel processing in the remote client copy ?
Thanks
Rishi