Sure techno is loop based techno. what i think is not realated in particular with WJH stuff, as i own some of his records an really like them.
Today, machines and softwares have evolved so much taht u can make tracks only with them. The 4x4 building of the track will make it sound "techno" and "loopy"...
But i dont really see the point in using a pre-made loop. A loop is not a sample, and is not like a guitar note/chord. A loop is a combination of that.
For example, I am almost sure intel have deposited their 4 notes melody. Sure the 4 notes can be used by everybody. But would u use the same 4-notes melody for promoting your brand???? Would b a total ripoff, and ppl like intel would put you on trial for this (and they would probably win).
So that's it. techno consists in using samples, synths to make a loopy music. But using premade loops, even free of copyright, is just really lazy and as a producer i wouldnt feel proud of using them. The fact that this or that producer is using the same loop, or has used it in first is just totally pointles, just make your own genuine stuff you beleive in and u wont have these problems.