[brucepick]

I say mods support and assist better technique.
The two work together for a synergistic effect.

Many of my mods decrease rolling resistance or air drag; some reduce engine load (e-fan). Without reducing rr and drag, P&G was nearly worthless. It wouldn't coast. Now with hard tires and some aero mods it will coast nearly anywhere, though still loses some speed of course.

Also if you consider adding SG or SuperMid to be a mod, then that also supports improved technique.