This isn't a topic I've kept close track of, but as far as I know, you're right. Google did something with the newest versions of Android to prevent apps from being move to the SD card. It looks like Samsung has found some way around it though, because I did hear about an update providing such App2SD support to the Galaxy S4, and my Note 3 has this ability as well. I don't know how many of Samsung's devices provide this feature; I've only heard about it for the S4, which I was considering for a while, and Note 3, which I ended up buying.