I personally just rode it for the first time. Really cool sound with a nice little suberbike burble on trailing throttle. I expected it to be similar to the 05 Speed Triple I had, the power might be about the same but the Yamaha feels snappier. I know that seems like a strange word to use, but everything, steering & controls wise seems sharp and abrupt. The throttle seems "touchy" and a little over sensitive at first, but you get use to it in a few minutes.
In the upper gears it has great roll on. It does not hit like and open class sport bike, but it is very respectable. In the lower gears power delivery in "A" mode is brutal. It is an "at will" wheelie machine. You need to have it pointed in the right direction and your chest above the tank if you are going to whack the throttle open in 2nd or 3rd. If you whack it open in first you will loop it out. The gearing is so much lower it feels like you have dropped two FRONT teeth off a countershaft of a really fast 750.
If you put dirt bars on it with the short wheelbase and 17" front it would feel like an insanely fast and very quick turning supermoto.
I think it is a very cool bike, but when you consider all that performance for under $8,000, it is a game changer.
Call it whatever you want, Street fighter, standard or UJM..........Yamaha has thrown down the gauntlet.