I'm not saying it's rational nor am I saying her speed is equal. This is what's shown, and what's shown indicates that her speed and reaction abilities are not far off from Naruto's & Sasuke's.Sakura is not as fast as Naruto or Sasuke go read manga first no sorts of your utter bullshit proves that shit Sasuke and Naruto had speed as fast as light in Bijju and Mangekyu Times and they got like 2 power ups after that While Sakura was shocked by hein Sasuke's speed and never get a powerup.
If RSM Naruto barely manages to react to something, do you think KCM Naruto could?
Here's a pure hypothetical.
If KCM Naruto could blitz Base Kisame, do you think Base Kisame could react to the arm? No. Sakura did. That happened. It's a fact. But it is still questionable if this hypothetical Base Kisame can, so Sakura's reaction and speed are past this hypothetical Kisame's according to mangafacts.
Do you think KCM Naruto could blitz any kage? What about BSM? Then transfer that line of thinking to Sakura.