That's a good point... what's the definition of crispy. I personally have a really high standard for this. If I look through my tank toward a sunny window that's on a nearby wall, I can see tiny particulates in the water, and I would conclude that it's not quite crispy, but if I look the other way through the tank toward an adjacent book case it looks perfectly clear... almost like looking through air.
I don't think that a photo of a tank posted on a web site can really be used to tell the difference between crispy and almost crispy... they all look pretty crispy.