But something new Hayes did learn in this study really surprised him.

When it's done in the lab, Hayes uses video microscopes to examine people' s tongues.

Aubrey: Hayes uses the blue food dye to determine just how intensely people can perceive tastes.

They choose highersodium foods than their nonsupertaster counterparts, and it's not what Hayes expected.

The gap between school training and work training is, indeed, one of the greatest failures of the British system.""In general schools don't want to know anything to do with the world at work, "" says Mr Hayes.