I see what you mean, theres a world of accessories and aftermarket parts out there for performance. I could go out today and drop $1k easily on "improvements".
Early on, I had the "pleasure" of owning a "sports" car. It was a 1963 Austin Healy Sprite. It had a 1089 cc BMC 4 cylinder engine, twin SU carburetors and I believe this engine was similar if not the same as used in the early Lotus 7. What was the zero to sixty time of this car? When it was new maybe 25 seconds. Yet, it was and will always be a sports car. But you make a good point that when a bike has the moniker "sport" bike it gives you certain expectations of performance to today's standards.
Does anyone know what Honda's record is with racing CBR250R?
When I find myself having to routinely pass at 80mph, I will probably start looking at other bikes (Triumph Speed Triple . . if I could get a lower seat to accommodate my stubby little legs).