Can't speak for anyone other than myself.
The Gi-Pro made a significant difference in performance on my'07 standard.
Not my imagination as it would run alright before,
but after,,,,no comparison
Totally different and instant response to command..
wanna wheelie? roll on it at about 25-30 and up she'll pop.
Wanna just do a burn out?
roll on it from a dead stop.
These are MY results, yours may vary..
But if you see NO difference in performance,
something ain't right.