Since 2006/2007 the consensus is,,, if you want to experience what is called "Blow-by" similiar to over filled oil in the bike where you have oil coming out of the left air intake break it in by the book,,,
If you break it in like you stole it the piston rings get a better seat and the engine is actually stronger in the end.
I broke mine in by the book,,, eventually had blow-by with synthetic oil, had to switch back to dino 20w-50,,,
My bud Seapup, rode it like he stole it from the dealer,,,, never has had blow-by,
I also had to do a airkit and 2 into 1 exhaust to keep up with his stock bike.
After talking with a lot of people that have/had blow-by, they ALL broke it in by the manual,,,
Next time I will be riding it like I stole it.