Bought myself a stopwatch specifically to try this but I only had time to do one run today. I'll try to do a few more to be a little more scientific but for now:
5.94 secs
The spec:
Facelift model (Oct 2004 build)
GTT220
Janspeed Manifold
Milltek
GRS Intercooler
Plus 450cc injectors, LC-1 Wideband and AFPR
One more thing, it's a convertible