We have had some discussions in the forum about whether general relativity + available scientific evidence shows that we must conclude that the universe is billions of years old.* Some YEC physicists have posited that violations of Lorentz Invariance could permit the conclusion that the universe is only thousands of years old.
If I have understood it correctly, the result reported by the T-SAGE experiment confirms that the position of YEC physicists is not scientifically sustainable.
The researchers report that the T-SAGE showed that the two objects fell at very nearly identical rates—within two-trillionths of a percent of each other. The measurement was close enough to report that no Lorentz violation was detected.