It's still a high dose administered twice daily locally to the tissues, any idea why 10 men did not improve on this?
Gyno can have a multitude of causes, of which estrogen is only one. Other (albeit related ones) include high GH, prolactin or cortisol, for which DHT may not be the optimal treatment. I think androgen + prolactin inhibitor would be much more helpful, as bodybuilders know first hand. They often use 5-AR reduced steroids and cabergoline for when they want to get cut/dry.