Thanks Pete.
I'm not sure what happens under hard full acceleration, but as I take the next gear and having closed the throttle and then release the clutch (which i don't just let go of, but feed it out whilst feeding in throttle) the power take up is abrupt. I need to do more of it and really concentrate on whats happening (rather than focus on the road ahead as I am usually travelling quite fast at this point!). It might be that she's slow to come off the throttle/fuel, despite my right hand closing the throttle. Bike is all standard and hasn't had any mapping or tuning, just a Termig pipe.
I'm not expecting a reaction like a 600 4 cyl with 150cc pistons, but it does seem to 'run on'. Ill do some testing and report back.