scook
The point is there is no need for a separate bus for the parallel compression if the compressor has a dry/wet adjustment. If you want to use another bus for the compressor to mimic the analog world, the easiest way to ask yourself should it be pre or post fader is think how the dry/wet adjustment is setup. The dry/web knob is prefader because it is in the compressor. To create the same compression technique without the dry/wet knob, create a send prefader so the mix can be adjusted when combined later.
But if one desires one comp to control multiple tracks (and is trying to save resources as Glenn has an older setup) it's still better to output those tracks to a bus where the compressor lives (without sends, just the entire signal) and THEN use the wet/dry mix, n'est ce pas?
I'll tell ya... the day I learned about using busses to keep effects consistent across multiple tracks (like doubled guitars/vox) was a very fine day indeed. Before that I was constantly copying my effects over to the other tracks after any tweaks. Enormous pain. Seems silly and brutish in retrospect. ;-)