I would say so.
How are you measuring that? Are you driving it and it takes that long for the needle on the temp gauge to get to where it should be? Or are you letting it idle up to temp?
My 2003 GT, still with the stock thermostat, does take some time to get up to temp. I'll drive for about 3 miles before the needle even moves. By the time I'm about a mile from work, it gets to where it should be.
Compared to my 2003 Explorer with a V6 that is fully up to temp within that first 3 miles...I dunno, it's kinda weird.