The 51% GPU usage thing was pretty stupid I agree. I understand what he was trying to do, but it did come out wrong.
When their rep was asked on Reddit why they did that, their response is they cannot show real performance benchmarks because out of respect of tech journalists and all the tech sites.
They can only show obtuse or "partial" performance numbers to give hints only. Their reasoning was they didn't want to steal the thunder from the tech press.
I disagree with that though because gamers always take results from hardware vendors with a huge grain of salt.
Just like "Pascal is 10x faster than Maxwell"... later we find out only in very unique compute application. Then JHH hyped it, "GTX 1080 is 2x as fast as Titan X".. only in their imaginary VR game that does not exist.
So gamers always will read the launch reviews from the tech press for validation. Even if AMD provided a full benchmark suite, people will still give clicks to tech sites to confirm.
My thought on this, they are holding back because they want to wait til the final launch, giving their driver team more time to *optimize* as much as possible. When they want the tech press to start reviews on it, they'll send a link to download the final bios & driver so these guys can run benchmarks. Prior to this, samples have different bioses and running on non-ready drivers, so any leak will be misleading.
* We all know how AMD improves performance of a new architecture over time via drivers.