The power-to-weight ratio of the Slingshot is pretty good, so it should easily out-perform most cars.
The sensation of speed in the Slinghot will probably be pretty high, as you sit so low to the road, with very low doors (does it even have doors?), so your elbow is just above the pavement. Compare that with something like a Solstice, which has a very high beltline (isolating you from the experience of having the pavement rushing by).
I think the Slinghsot looks pretty terrific, from a fun-to-drive and performance standpoint!