Going on the assumption that the OP was talking about using a reticle vs dialing. The short answer is "no" as it can be the second shortest component of the entire shot process (over simplified below and excludes wind calls).
1) Confirming the range (3-5 depending on weather and consistency) takes longer than looking at what to dial (ex: cheat sheet) and dialing it.
2) Getting into the rifle and acquiring the target takes longer than looking at what to dial (ex: cheat sheet) and dialing it.
From what I have seen this is a hunter's biggest issue and time drain (myself included on more than one occasion). Having a partner makes life a lot easier and can be a major time saver.
3) Getting steady and/or comfortable can take longer than looking at what to dial (ex: cheat sheet) and dialing it.
From what I have seen this is a hunter's second biggest issue and time drain.
<Depending on the terrain and where the animal is (angle), this can take awhile>
4) Waiting the animal to present a shot can take massively longer than looking at what to dial (ex: cheat sheet) and dialing it. Can be a lot of back and forth between binoculars and rifle depending on what the animal is doing.
<Have had animals bedded and had to wait almost an entire day to stand up and clear for a shot>
5) Taking the shot (re-confirm target, spotter ready, shooter ready, bang) can take longer than looking at what to dial (ex: cheat sheet) and dialing it. But the bang part is fast (fastest part of entire shooting sequence).
6) Re-acquiring the animal while chambering a round takes longer than looking at what to dial (ex: cheat sheet) and dialing it. This is especially true if the animal moved a considerable distance and you have to re-range. Obviously low(er) recoil can save seconds on this part which is one reason why brakes, suppressors, lighter recoil firearms, etc are beneficial.
You get the point.
Very easy to practice this at home with a laser cartridge, "safe" weapon, a multi-species target (e.g. see below), and maybe a SO that loves to bust your bits. Have the SO call the target, confirm the target, have the SO throw out 3-5 bogus yardage readings (throw a curveball in once in awhile), lookup reticle/dial info, pull out your rifle, get into your rifle, acquire the target in your scope, use reticle or dial, get steady, "spotter ready/shooter ready/bang". Do it timed; depending on the app it can record your time and where you hit. Even more fun when the SO calls out the wrong direction that the target is facing. Pack everything up and do it all again. I have found this to be a very effective way to reduce the time to get a "good" shot off quickly.
