It's not supposed to print anything on the screen, it's spending all it's time doing it's job.

use "top" or "ps" to look at process status

You should see "find" and "xargs" working like mad and "rm" with it's pid counting up as each "rm" is run with a group of 20 files.

Also if you do an "ls -ld" of the parent directory you should see the inode reference count dropping as each file is deleted.