Does this thing ever wake up?

i do, it just shuts throttle down by itself.
So it’s 50% throttle, not related to rpm? You haven’t had the first service? If you did, there’s nothing in the tune in sport mode that would keep you from doing 0-60 in 3 sec. It sounds like you’re hitting a limiter but not the rev limiter but even if Triumph has a restriction during the break-in period, it shouldn’t be there after.
 
Just been thinking on your issue, go into your modes and look at which MAP setting each mode is configured to. With what you're describing your bike may be set up with Rain MAP for throttle response in each mode.
Get in there & have a look, or at least configure Rider Mode to how you'd like it & see how she goes with those settings. If it still chokes after 50% throttle, there's something else amiss with your bike, have the service dept sort it under warranty.
 
Id be calling my dealer first thing in the morning. I don't know if they limit you the first 1000 miles because I took it easy until I got past that mark but there should be no reason if does what you are saying if its not being limited in any way. At 4000+ rpm you should be hitting peak torque not dropping off.
 
Something don't sound right, never heard such a thing from a new rocket owner. Even straight out of the store those bikes are monsters!