There is a considerable performance difference between returning data in Toad for Oracle and SQL Developer when the data with XMLTYPE column was being returned.
This can be seen by running a simple SELECT statement.
One could see a performance difference doing a comparison between Oracle SQL Developer and Toad for Oracle.
In one test, with the same connections and same query, SQL Developer only took .6 sec; where Toad for Oracle took 6 sec before it brought back the same 50 records.
This is associated with XMLTYPE columns and how data is being displayed and results returned.
WORKAROUND:
Comment out the XMLTYPE column in the SELECT query
STATUS:
Waiting for fix in a future version of Toad for Oracle.
