I just did this in about one minute. After reading all of the posts, I decided to do this when the car was nice and warm. Car was in work parking lot all day in sun (85 degrees), drove about 15 minutes home to find my grills on the front porch fresh from Turner Motorsport.
Came in and cracked a beer, then went out to the garage to gauge how big of a task this would be. Grabbed a hold of the right kidney grill and started to pull outward while wiggling just a bit. Grill came right out. Ditto for the left. Put in my new grills in about the same time.
Must be the temperature of the plastic that made it so easy...that and maybe the fact that it is only a couple weeks old?