I'm assuming you mean the Cessna LSA concept aircraft rather than the NGP concept, as they are intended for two very different markets. The LSA is the two-seat spiritual successor to the 152, and the NGP is a 4/6 seat high-performance single.
In terms of performance, not much has been said about the LSA aircraft, although I would surmise that it will match the maximums permitted by the LSA category rules; that being a 120 knot cruise speed, 1320 lb. max gross weight and no more than two seats. Also, Cessna has said repeatedly that they would very much like to keep unit cost below $100,000.
Time...to un-pimp...ze auto!