I spent, literally, days doing my own research on break-in methods, as well as reading what a bike, or any vehicle, might go through before it even leaves the factory (full throttle, bouncing off the rev limiter for up to 30 seconds). That, along with the conspiracy theories. For instance, an easy break in takes longer, so it might be months before you get to 600 miles. If you can keep it low, your warranty runs out. Things like that.
My opinion is that the idea has merit. You want the rings to seal. They need to do that before the cylinder walls smooth out. In order to do that, you need pressure. That process can take place within the first 30-50 miles.
I put 13, HARD miles on my bike in 30 minutes, then let it cool off at the bar I was playing trivia at. Then 13 more hard miles on the way home. I'm talking 2500rpm, 2nd gear pulls to 6-7k, then only letting the engine slow me down. On the way back, it was up to 10-11k, again, letting only the engine slow me down. Open road, and certainly not for very long. This is another key to the hard break-in. Engine braking can help get whatever is on the cylinder walls out via the exhaust. Proof? No, none, it's my opinion.
I changed the oil and filter the next day at 28 miles on the ODO. It was dark, but I couldn't tell if it had any metal in it. Then I rode it spirited over 2 weekends and put another 572 miles on it. I again changed the oil at exactly 600 miles (got lucky, it clicked over pulling into the driveway) and am in normal mode now. I still vary the RPM's, but I do not baby it. It runs great, mileage is going up, and it doesn't smoke on decel. I have just under 900 miles on it.
Another way to do a hard break-in is on the dyno. This has merit since you won't be doing triple digit speeds on the street to get it done. But I'm cheap, and a daredevil.

And since it's 110 outside, and in a dyno cell, cooling might be an issue.