I just do not get this 40 teeth at the back thing and 30 teeth at the front? I never viewed myself as a mutant but it seems that I am as I can get up steep hills with no fuss running an 11X36 cassette and 36t front ring. On the steep stuff if you are in too low a gear you spin out as to get over roots and rocks you need a quick burst of power, slow and spinny just does not work. I do not sit down to climb though and am out of the saddle.
Just interested if it was only me as find the excitement over that 40 teeth heath Robinson contraption and 10/11 ring cassettes a bit strange.