I think the truth is somewhere between what you and dTal said. First, Racket isn't much more different from "Scheme" now than when we changed the name in 2010.

I think the truth is somewhere between what you and dTal said. First, Racket isn't much more different from "Scheme" now than when we changed the name in 2010. Second, if you copy-and-paste a random portable Scheme program into #lang racket, it will probably work. This is somewhat less likely than with most systems that call themselves Scheme, but way more likely than with Scheme's closest relatives (Arc, Clojure, etc), and similarly with Java vs C. Ultimately, Scheme is a language family, and Racket is further away than most or all of the other members, but there's considerable distance between Guile and Gambit as well (to pick some other examples). Full disclosure: I'm a core developer of Racket, but not all of us have the same perspective on this question.