What an absolutely baseless claim. It's one thing to say they'd score more, because the Serie A is not as strong as it was when they played in it, but to claim they'd score double the amount of goals is silly. I see this kind of argument too many times to be honest; for example, a friend of mine who was very much like yourself, a chest pounding Serie A fan; claimed that Shevchenko would score at least 40 league goals in the EPL when he moved to Chelsea, because at the time he was banging them in for fun in the toughest league in the world, we all know how that went.