Alright bro. Let me see the "dramatic" difference it made for your physique vs. you just eating regular food all the time and still getting the same macros.
You body is constantly going through the digestion process throughout the day, with many meals "overlapping" the pre/post workout period. The digestion of a meal can last for hours and hours (depending on the size and macros of the meal), making nutrient timing essentially useless.
The guys doing IF may be a different story, since their intake of "quickly" digesting proteins would be on an empty stomach. Even so, I personally don't think it would make a whole lot of difference as long as they reached their overall macro goals by the end of the day.
Even on an empty stomach, whey still takes about an hour of digestion to reach peak amino acid levels in the body before dropping off again. Are you timing your whey protein shake an hour ahead of your workout to get the "best nutrient timing" for your body? An insulin "spike" (if you can really even call it that) isn't going to decrease the amount of time your body needs to digest whey or any other food. And if you've eaten anything at all before your workout, forget about it. All that food is probably still being digested and its nutrients slowly steaming into your blood to deliver it where ever it needs to go.
There are are other biological functions of your body besides muscle building that require nutrients as well. Once food is digested, nutrients can reside in your bloodstream for hours, just waiting to be used in any number of biological functions. So in effect, any meal you consume within hours of working out could be considered "nutrient timing" since the nutrients from past meals are still floating around in your blood, just waiting to be snatched up for whatever the body needs them for at the time. Could be muscle building, sure. Could also be creation of new cells in the body. Or repairing damaged tissue. It's gonna be used at some point during the day for whatever the body needs them for... and if it's there's an excess of nutrients available over a long period of time, it gets stored as body fat.
I know I'm gonna get some flak for this post, but I'm just not buying into the whole nutrient timing thing. I did the sugary carbs + whey protein pre/post workout for months and didn't notice a lick of difference between doing that and just eating normal food (macros still the same at the end of the day). Sure, I made strength gains and my physique was improving, but I didn't obtain mystical PRs on every lift or magically gain 18" arms like the supplement companies would have you believe.
No disrespect to you, either. If doing what you do works for you, then by all means do it.