Taurine is usually even lower, about 0.2-0.5% in most cat foods. It's measured using an amino acid analyzer, I think. It would actually be more important to measure the blood taurine level instead of the food taurine level. Much of the taurine in food can be destroyed by heating or cooking. There are also several factors that can degrade or deplete taurine from the body. Bacteria in the gut degrade taurine and fiber in the food can contribute to this. Since bacteria grow best when the cat eats wet food or raw, the cat needs more taurine in a wet or raw diet because of that. This is not to say that fiber and gut bacteria are bad - they can be very beneficial especially for cats with digestive problems - but they increase the cat's need for (usable) taurine in the food. There should be enough taurine in raw meat, but taurine is frequently lost during food processing and then has to be added back after cooking.
If you want to give your cat a taurine booster treat, there's a huge amount of it in scallop, mussels and clams.