Yea it seems RBR are the only "grumpy" kid where as Ferrari and Mclaren just knows that this sort of innovations comes along every once in a while and you can choose to react to it or not.
Mclaren might even have some trick system on their car. The downforce of the car seems to be really good but the top speed is there as well.
RBR is probably carrying the most DF but lacks in top speed. So i wonder if Mclaren already possibly have their own take on a passive system.
Or, it´s just a very good car they have aero wise.
Yet last year the shoe was on the other foot, and both Ferrari and McLaren complained about Red Bull, so much so that they changed the rules mid-season.
It really isn't like those 2 are the nice guys of the grid at all.