Couldn't read everything, will answer in a dedicated thread tonight. Now I've got a show to play.
Play your show. Come back to this. End of discussion.
Helix Poly Capo - 10.4167
Helix Poly Whammy - 9.1667
Helix Poly Pitch - 10.02
Helix Simple Pitch - no latency that I can detect, but EXTREMELY smeared transients.
Helix Twin Harmony - no latency that I can detect, but EXTREMELY smeared transients.
Helix Pitch Whammy - no latency that I can detect, but EXTREMELY smeared transients.
Rubber Band Pitch Shifting Algorithm - 391ms (with Reaper default settings)
Elastique 3.3.3 Pro - no latency that I can detect, but EXTREMELY smeared transients.
Axe FX III Advanced Whammy - 12.15ms (set to notes mode)
Axe FX III Advanced Whammy - 11.05ms (set to chords mode)
Axe FX III Classic Whammy - 29.1875ms (set to notes mode)
Axe FX III Classic Whammy - 29.13ms (set to chords mode)
Axe FX III Virtual Capo - 8.96ms (set to notes mode, tracking adjust at 5.0 - shift at +24)
Axe FX III Virtual Capo - 7.71ms (set to notes mode, tracking adjust at 10.0 - shift at +24)
Axe FX III Virtual Capo - 9.88ms (set to notes mode, tracking adjust at 0.0 - shift at +24)
Axe FX III Virtual Capo - 22.33ms (set to notes mode, tracking adjust at 0.0 - shift at -24)
Soundtoys Little Alter Boy - 1.73ms (sounds awful though)
Okay - now I say NOTHING else!!