ACM Queue - Schizoid Classes - Of class, type, and method: "Good article. Just two notes. First, a commercial Smalltalk is not noticably slower than C# or Java. Second, Smalltalkers (and other dynamic language users) consider the lack of static typing a HUGE plus, but that gets into an unproductive religous war that both sides should just agree to disagree on.
Regardless, I would not consider either a 'high price' to pay."