Not true, I have caught a number of nice midrange domains using that program. As long as you have reasonable expectations, you should not be disappointed.
You would have probably found with those names that you could have got them without the script, IE:, after they dropped you could have gone to any registar and just registered them.
Suppose that is a way of automating the process, but it certainly should never be considered as an alternative to any drop catching services (Even godaddy )