From Wiki (I know it's not always right, but it is on this occasion)
"In 2002, the Mars bar was reformulated and its logo was updated with a more cursive appearance. Its price also increased.[2] The nougat was made lighter, the chocolate on top became thinner, and the overall weight of the bar...
A wonderful post full of factual punditry of the highest order. I'm going ripple and agree wholeheartedly.
The Mars would have romped it a few years back, before they changed the recipe.