I agree with the general bullet proof status quo. This engine rules. It loves having its neck wrung and the piss beat out of it. Of course, if you do so make sure to check your oil level quite often. I always check mine at every fill up and at the beginning of every day or if I get done with a long cruise. These bikes will use some oil at high RPMs and they need all the oil they can get.
I say shift at 12.5k-13k. That's the sweet spot.