Mid tempo can be just as extreme in content, and isn`t middle of the road at all.
Extremes as in really fast and full to the brim with noise and compression/really slow and minimal are to me obvious.
I think the mid temp stuff that is done intelligently is basically music for a more mature ear (that hasn`t slowed doen and mellowed too much) and we have lost the older element in techno as a lot of us have grown up and moved on.
youth will always want more obvious extremes (such as schranze) with a more "on the surface" attitude.
and the older fogies who can`t hack the pace, but don`t want to quite resign to house, have minimal to entertain their aging bones.
I`m sure the cycle will come back and the mid temp stuff will re-emerge again. (well, not so much sure, as hopefull).