Sorry THG...been in da mountains
I know,I know, I am being a little silly and picky about it, but to me DWC is a different monster from traditional "hydro". Maybe because I'm old, and remember when DWC first started. In reality, I guess it is all considered "Hydroponics".
For me, Hydro was/is something like a flood table, top water feed/drip thru a soiless type medium. I guess "soiless medium" being the key word. Some type of medium goes along with "hydro".
DWC was/is different. Instant uptake with no medium whatsoever, just fast uptake, if all is well. The plant never lacks as a steady supply of perfect ppm/ph'ed and water temp water ready for use. BUT, it all has to be perfect to get optimum results.
Hydro is a little more forgiving, as you can trouble shoot out of problems a little easier without devestating results as in DWC.
I don't know, I think DWC is a harder discipline to master then a flood table.