My estimate- 50 : 50
I've had a similar epiphany lately. For most of my bass playing career (~15+ years) I was focused on modern prog metal and more a less perfected my tone and technique-gear relationship (a complex relationship involving breaking up/compressing vacuum tubes just right) as far as I was concerned.
For the last months my only project has been helping my friend with a hip hop oriented project and found out my amp settings for metal worked fine if I just played smooth and toned down the controls on my bass.
I was recording some proggy stuff lately and couldn't get my old tone! The midrange just wasn't there. I was considering trading around some gear (which was ridic since I was only using DI on the same model of head I owned before), retube... something, and getting desperate.
Then I remembered how I used to play, which was hard as f---. To get my flavor of midrange out of my rig, I really have to pull it out of the instrument. Here are some examples... both are DI, not mixed. Tones are evident in the first :20 sec.
Exhibit A - Smooth tone (gentle attacks, bass/mids boosted on bass, Sansamp in front)
Rap-Hop Demo Track by dr_thunda on SoundCloud - Create, record and share your sounds for free
Exhibit B - Rounded metal tone (same amp/gear settings but aggressive attacks/slaps, bass set close to flat, Sansamp in FX loop)
Thundar - Adam Jones / Frusciante on Crack Solo by dr_thunda on SoundCloud - Create, record and share your sounds for free