No it isn't: X has supported hardware acceleration from the earliest days and continues to do so. See, for example GlamourGL, in which Xorg uses OpenGL shaders to do all the 2D drawing operations.
There's a reason that any serious graphics rendering under Xorg uses DRI. It's because DRI bypasses most of the X stack.
No, that's utter crap. Wayland doesn't do that AT ALL. Wayland is basically a system for sending bitmapts to a compositor and have the compositor send back input. Wayland provides very little else and certainly no rendering.
So what you're saying is wayland gets the cpu out of the way so applications can render on the graphics card more efficiently? wow why didn't I think to say that?
Applications are expected to render to their own buffers using something like DRI, which is PRECISELY the same as they use under X11 too if running locally.
So what you're saying is all that Xorg nonsense just bogs it down and anything rendering 3d any serious graphics is just going to do direct rendering like wayland prefers anyway? holy shit I wish I had thought to say that... oh wait I did.