it's an understandable reaction but he did make it clear that its a different thing to that movement
"IDM, if it actually was serious about the "dance" bit of Intelligent Dance Music. IDM, hip (acutely hip) to where the real energy centers are. IDM, with none of the parody-it snark/goofiness of drill'n'bass/squarepusher/kid606 (if anything, gone the other way and a wee bit too earnest and reverent)."
that basically strips a lot of IDM down to nothing though, the IDM that makes people turn away in revulsion at the very thought of it anyway - pretense masking lack of musical content. so i don't think pointing out the social similarities is necessary or particularly useful. all he seems to be saying is that some of those guys were articulate about music, and some of these guys are too.
'this is similar to stuff that it's not actually very similar to at all.'
the only directly negative bits of the article are about the 'peripheral stuff', the names and the vibe he gets, which i think you're right in thinking is slightly skewed by the distance at which he views it