I personally was a little surprised by the results. But added keylogger protection some time ago after reading how difficult most are to detect by popular security apps. In fact, my highly rated AV package could neither detect the keyloggers I have running in real-time, nor by a separate on-demand scan. It also didn't detect AntiLogger Free whose behavior is very similar to a keylogger itself. However, Malwarebytes Free did detect them all using an on-demand scan, and I had to make exceptions not to delete them.
BTW, if you do use an anti-keylogger app, its important to let it auto run at startup by default. Should you run it after a keylogger is already running, it can actually render its protection useless as the keylogger can take control of the clipboard. So not a perfect solution by any means.