Maybe you have to go to the advanced boot camp to learn about expectancy. Seriously, 4 cent wins & 10 cent losses just won't get you anywhere with openings. For one thing, you can't use rigid numbers like that. The liquidity and volatility of stocks varies too much. My lowest priced, thickest stock I don't look to take the first bit of profit until 5 or 6 cents. But on something like BBY or UNH, I'm looking for 15 to start. And I scale from there. Sure, you'd have a great win rate on them at 4 cents, but a 10 cent stop on a stock like KSS when you are wrong? Not a chance in hell.
Second, as has been pointed out already, you have to milk your winners when you have them. Some days you get some unbelievable wins, but if you have a limit order 4 cents up, you miss out on all of it (oh yeah, forgot the "price improvement"). The big days come when the market makes a nice move and you cut the losers quick and let the winners run. I would think Don is teaching these guys some subtleties and more than just what you have in your post.
At least they are starting small. And if you want to learn to trade with little to no money up, you can expect to pay through the nose in terms of commissions. If I was training new traders, I would start them on openings too. I would just teach it differently.
Which gets me to thinking.... How much would someone pay to learn to trade openings from someone who can back it up with real numbers and can get you a reasonable rate? Hmmm...