Here's a video I took a while back. 03 Pathy Chinook, everything stock, no big cargo or sound systems, still with accessories like roof rack and spare tire. I originally took several videos, they were all within 0.2 seconds of each other.
http://www.youtube.com/watch?v=ZrZK7R_XCWc
(Edit: The trim for the '03 was Chilkoot, not Chinook. In this context, though, there's no difference.)
I originally timed it to be 8.32 secs from full stop to 100km/h, full throttle. Watching the video again, it's somewhere around 3.5 - 4.0 secs to reach 60km/h.
I'm really surprised it takes you so long to get to 60km/h. You do have the 3.5L VQ35DE engine, right, and not the 3.3L? Notice any other issues with the Pathy? Check engine light on?