There was a study, I know It wasn't very long, but when injected with double the normal amount of test, estrogen and DHT they could not get LH to drop while the test subjects were taking clomid. So yeah, there is SOME science behind it. And if it can eliminate estrogen sides on cycle too, why not give it a go. (torem preferably)
And the clear evidence that it can make testosterone go from 750 to over 1,000 shows that it works in the presence of testosterone. What is unclear is how much testosterone it takes to overpower it. It worked with 50mg dbol, and dbol is quite suppressive, if not completely suppressive, at that dose.