Originally Posted by: rivergait 
I find the rotisserie chicken available at my local grocery also to be smaller than before. While Costco's famous product is traditional size, smaller local producers are using tiny young Cornish Cross chickens, probabably less than 8 weeks old. While I can make 2 or 3 evening meals for me as a single eater, these little guys seem to be what used to be called Cornish Game Hens (in reality, a very very young chicken).
At the responsible age of 9 I bought 50 Leghorn chicks in order to earn my own spending money by selling the eggs. About 9 months later I had the money saved up for a car-coat. How is this relevant? I was taught that (Rock) Cornish hens were simply a separate breed of chicken (along with the nasty bantams my cousin had), one that was usually slaughtered at a younger age than the Leghorn or Rhode Island Red. Yes, the breeds have changed substantially since my car-coat days, but I would suspect that the (Rock) Cornish hen is still a designation of breed/group of breeds.