How to get sharp red to blue in weight paint from vertex group I am following How to make towels tutorial by BlenderGuru.

I can't seem to get that sharp red to blue that he does. My selection includes the full weight gradient (greens and yellows. view images). Is there a setting that I am missing? BTW - The vertex group is the whole mesh with weight set to 1, and the selections are set to a weight of 0.

Selection:


Weight Paint:


UPDATE: adding blend file in case anyone wants to take a look at it. Note - the particle system was removed to reduce the file size
The values are correct - the sub-division represents it with gradient.