I did some testing today and it really grinds my gears... I have a 3rd party adapter 5 in 1 (hdmi, usb, sd card, micro sd, micro usb) standard 5 pin mhl and an adapter for 11 pin mhl.
-my wife's galaxy s2 works perfectly with the 5 pin. Outputs full 1080p / 60hz smooth and responsive.
-My sgs3 doesn't work at all with the adapter (4.3 stock), it starts charging but there is no image on the screen.
-my note 10.1 2014 works but it outputs 1080p / 24hz and it has a really bad delay that makes it impossible to play games, and of course 24 fps is laggy as ****. And of course it has black boarders on the side.
I can't believe that there isn't a settings menu for hdmi. Even my old transformer tf201 had one. And you get the best experience with the 4 year old sgs2(running 4.2). Unbelievable.
Phone: Samsung Galaxy S III | Stock rooted
Tablet: Galaxy Note 10.1 2014 Edition Wifi | Stock rooted