John, I've been doing quite a bit of testing of our NT mobile apps in a variety of devices, but have not had a chance to try a Samsung. However, the devices we have tested with are iphones, iPads, an Android Vizio, and the Kindle Fire which is based on Android. In all cases, I have not experienced any speed issues (other than related to the device itself such as the Vizio which is a slower tablet). This is in both mobile mode as well as Desktop and Detect modes. The only issue I have found with some android devices is the drop-down menu issue, but that's a different story. As far as speed though, at least in my experience I have not noticed any differences based upon mobile/desktop modes.