It already was mentioned a few times in this thread: This scene shows much more than 1 mio polies. The fortress models alone sum up to this. There is still a huge terrain and the desert village, palm trees, sky, an animated character, per-poly collision detection, a weapon, some scripts running, multi-resolution real-time shadow mapping (highres shadow map near the camera and lowres shadow map in a distant).

Your link to a shader collection is no comparison to this.

In the end you are assuming and I would say: seeing is believing.
I saw impressive scenes in T3D, in Unity and C4. They made their points, they proved what they can deliver.

But back to T3D:
Some of you wrote about having the source code. This can be nice and helpful an in the case of Torque it is often needed. But I know from several skilled programmers that the Torque code is not always very well structured. They mention the C4 engine code as the best engine source code, easy to read, well structured and well engineered.