There is a reason that many cannot taste the difference. Ever watch Hell's Kitchen when they put a mask on the chefs, and have them tell what they're eating? Most cannot pass the test. Smoking, allergy medicine, etc. are blamed, but that's not entirely true. Have someone grab a store bought egg and scramble it plain. Don't add oil, butter, salt, or anything to it. Put it on a small bowl, or on a small plate. Have them do the same with a freshly laid egg from your chickens. Only the other person knows which is which. Now taste from each sample, BUT cleanse the palate with water when you switch to the other sample. If you can't tell, at first, keep repeating it. Most people, by the time they get to the last of the egg sample, will begin to notice at least a slight difference, and be able to give the correct answer.
Once we eat a basic food, our brains input the information, giving us a preconceived notion as to their taste. Thus, when you see a basic food, even before you eat it, your brain is already telling you what it should taste like. Subtle distinctions tend to be lost. Our taste buds are not being told to taste for subtle distinctions. I said "subtle distinctions", not major ones like condiments, sauces, flavorings, etc. Doing the aforementioned taste test, changes things up. First, the egg is NOT scrambled in the traditional method. It may look the same, so the brain may try to tell you it tastes the same, or almost the same, but you know that's not possible. Slowly, your brain has to adapt to this new information, and wake your taste buds. Secondly, while the brain is working to add this new information, the two sample look the same, so our brains initially tell us they must taste the same. We know that's not so, therefore the brain must once again input even more new information.
We can even carry it a step further. Once our taste buds can clearly tell between a store bought egg, and a freshly laid one, adding another ingredient, such as a little chopped onion, to both the store bought, and freshly laid egg, then doing the taste test, we should still be able to tell which is the fresh egg? This is only with eggs.
Tomatoes work the same way too. Take the same type of tomato grown in the summer, and fall. There is a big difference in taste. Without a basis for comparison, and challenging our brain's preconceived notions, waking up our taste buds, the difference goes unnoticed.
Most other foods work that way too.