You should read the entire post he put up. He clearly says he is not telling anything until all the testing is done. Right now there are only three manufacturers of GAN amps....so we know two of them are probably in the mix. We will all have to wait till he posts more info.
What will be really interesting is how a few of the latest mosfet amps compare with the brand new GAN amps. There are very few who have even listened to the latest class D amps.....let alone 4 different brands together and even more coming in to test. The findings should help everyone in different price ranges. I said earlier.....class D is all over the place....just like all classes. Whether using mosfets or GANs......all amps will sound different....for everything you do makes for different sound.
There are mosfet based class D amps that are marvelous.......even though George says they are all crap. He has not heard the latest mosfet amps. Those of use that have heard the best of the latest mosfet amps know that Class D has already arrived. If GANs can take it higher....then that is good. But right now you need at least $15,000 to get a basic GAN amp (except for the 50 watt a channel Technics integrated).
In a few years when GAN amps are available real cheap then these $15,000 plus amps will be boat anchors. There is no reason that a GAN amp has to be much more expensive than a mosfet amp. The difference in price between the devices is actually very small. The only reason Merrill and AGD are charging what they do......is because they can. You could take the circuitry in the AGD amps and put it in a basic black box (no tube nonsense and plexiglass with glowing LEDs inside) and sell it direct for maybe $5-6K for the pair. Once IcePower or Pascal or UCD or ? make modules with them then the prices of stereo amps will start at $1000. But right now we have 600 watt a channel mosfet class D dual mono amps that sound great for a mere $2000 (yours truly coming very soon).