I agree, most of the time they look over the top. But;
Do keep in mind the possibility that by default manufacturer's and/or retailers set TVs to insane saturation and contrast values to make everything pop and scream for attention in stores. The TV that produces most light is often the one customers walk up to first.
What I always do when I install an LCD/LED screen is set everything to default and then callibrate it to accurate values. In that case, the color & contrast on LED displays are absolutely amazing.