Does beef flavor come from fat?

Our earlier post (The taste of beef), pointed out that the USDA beef grading system is based largely on visible carcass fat, the best grade known as Prime.  When the grading system originated (1920s), almost all beef had a much higher percentage of grass in their diet and harvested…

The taste of beef

In a previous post (A cow named grass-fed) it was noted that animals raised with a significant part of their diet as grass will have a taste quite different from corn-fed (conventional) beef.  Why is this?  Doesn’t USDA Prime labeled beef mean “taste great”?  One would think that…