Interesting stuff. But: have you gotten into a "serious" fight since you've been training this way? Do we know if it has practical use?
Iron Hand training is not an "end all, be all" training method. It is meant to compliment a holistic martial skills/strength and conditioning system. It will not turn you into a competent fighter in and of itself. Iron Hand/Iron Body is meant to strengthen your body so it can handle the high force impacts (giving and receiving strikes) associated with an actual fight (in or out of the ring). You will know it is practical after you have taken up the training I've outlined. Broken hands and broken ribs aren't fun and this method is highly effective at preventing such injuries. You will develop more powerful strikes but that is due more to increased hand and forearm strength. When the bone structure and musculature of the hands and forearms are weak and brittle you are unable to strike with the full amount of power your body is capable of producing.
I spar several times a week at a light to moderate level. A few times a month my training partners and I will go all out. Our sparring gear consists of MMA gloves, mouth guards, head gear, and athletic supporters. None of us have sustained injuries in several months. Also, I work in Loss Prevention security (I arrest shoplifters). Quite often I have to detain people who resist and resort to physical violence. While I am not allowed to strike these people unless I am in serious danger, I have been struck quite a few times. Never have I been hit and injured. I feel this is due to the training I have outlined in my article.
So will this give me enough to stand up to a real boxer?
No. You still need to train in a realistic martial art.