Heavy with low reps actually seems to cause more hypertrophy in me than anything else.
Was just kind of skimming through this and thought I'd add in something I've been trying to read up more about:
The rep range for any kind of training actually has a lot more to do with your red/white (fast/slow) fibers than anything else.
Everyone has different percentage makeups and the makeup of each individual muscle actually varies in every person.
What this means, from what I've read, is that it's entirely possible that your quads could respond much better to low rep/heavy than med-high rep/lighter simply because it has more fast twitch fibers (as an example).
Then lets say your chest is more slow twitch fibers than your quads, so then you'd probably benefit more from higher rep ranges as they wouldn't be full used at a lower rep range.
Just some stuff I've been reading, not really sure if it's 100% accurate, but it seems like it's a fairly viable idea and makes sense when thinking why some people grow better in diff rep ranges.
Also, supposedly, you can get an idea of your fiber make up using 80% of your 1RM max. People with more slow fibers can supposedly rep out ~12-15 or more reps at this while people with more fast twitch can only get anywhere from 8 and less (generally speaking, of course).
I dunno, just an idea I heard that makes sense to me.