Yes, Assuming you are using the same query in both the database and your load statement in Qlik then this will be due to the time required to transfer the result over the network to Qlik, not due to the time taken to perform the query.
One possible solution might be to load the original tables from the database into Qlik first, and then perform the joins etc in your current query in Qlik itself. Often, the original tables will be much smaller than the result of a joined query, so the volume of data to be transferred over the network is smaller, so the end-to-end reload time will be shorter.
