do you care if you see a drop via the onboard temperature measuring device (especially if you are an amd user?). As in the test, they used a dedicated test bed (which is highly accurate compared to socket-thermistors), and it showed a 2.5C drop versus AS3, 2C versus Shin Etsu stuff, but that may or may not show up on a socket-thermistor.
So while it is probably cooler, you may not "see" the temp difference.
Mike