They all do this. What they should actually do is set the ram speed to what is on Intel ARK. 2666 is the rated speed for this processor according to ARK and AMD lists 2933. No manufacturer is going to refund you because you bought anything over the listed specs of your processor, Sorry sir, yes your motherboard does support 2000000ghz ram but your processor only supports 2666 according to its manufacturer, next time please select compatible products.
I cannot wait to see actual benchmarks where we don't have a company telling them make sure ours outshines the competitor. I've no doubt this will out perform the ryzen by a margin, but no where near as much as they have made out, certainly not 300 quid margin mind you.