The results are slow for 540hp, but not bad for a naturally aspirated version (in my country, a Pontiac G8 GXP or even just GT). It is easy for many supercharged cars (and much harder for turbocharged cars) to perform like less powerful naturally aspirated cars. The only way around it is to accelerate in a low density altitude under clear conditions.
The Jaguar XF SV8 was as fast as the BMW 550i and Mercedes E500 in most instances, despite packing an extra 40-60 advertised bhp. But theoretically, it could do much better.
There were times when the Mercedes-Benz E55 AMG Kompressor was barely faster than the C55 AMG or Chrysler 300 SRT8. But very rarely would it be on E63 6.2 or BMW M5 V10 level when it came to quarter-mile performance; again, it would need a lower density altitude, near-perfect road surface, and for manual mode to be turned on.
Nowadays, supercharged and turbocharged cars generally have been engineered to reduce lag by flattening the torque curve and installing torque-happy paddle-shifter/multi-clutch transmissions.