They certainly aren't holding back from claiming so and even tested several other brands.
https://www.prnewswire.com/news-releases/hi-tech-pharmaceuticals-release-of-tribesterone----a-potent-testosterone-booster-that-is-2100-stronger-than-its-closest-competitor-300823464.html
https://www.prnewswire.com/news-releases/hi-tech-pharmaceuticals-release-of-tribesterone----a-potent-testosterone-booster-that-is-2100-stronger-than-its-closest-competitor-300823464.html