Cheeseburgers will ALWAYS be better than pizza in my book!
Anyway, to say that pros lead up their rackets so as to feel like the "rackets of yesteryear" is probably false. If they wanted the old racket feel, they would use the old rackets. Plain and simple. They add lead to make their rackets more stable and perform how they want them to. Vika isn't going to be able to return Serena's serve with an 11.3 oz racket