I have done exactly that. My previous car was an SS Camaro - fast. Not Tesla fast, but plenty fast. I would beg a police officer to give me a ticket for "acceleration" within the speed limit. The judge would laugh him out of the court room.If you're first at a stop light and then accelerate to 45MPH in two seconds after the light turns green, I think most LEOs will define that as "exhibition of speed". If you doubt that, try it next time a policeman is next to you at a light.
edit: Just FYI in case you think I'm a straight-arrow type... once I got two speeding tickets on the same day. A return trip from L.A. on US101 where I was probably 10-15MPH over the limit in both cases. That's actually my one driving flaw; I tend to be at least 10 over whatever the limit is when I drive on the highway. In street driving, it's probably more like 5MPH over but I did get tagged for being 10 over a 35MPH limit a few months after getting my 3. On top of that, the officer gave me a fix-it ticket for a missing front plate (required in CA).
And less *you* think I am some kind of reckless danger to all mankind, I haven't had a speeding ticket in 20 years. Driving fast within the speed limit is what I do, and no one gets tickets for that - at least in Utah.