Agreed. It’s much easier to assimilate than in Germany I’d say. The ceiling or bias simply doesn’t exist in US whereas perhaps due to historical reasons it exists in Germany. From experience, Turkish are treated as “mainstream” in US than Germany.
It's been a long time since I went through SICP, so someone with more recent knowledge should correct me. But I think you can get through most (almost all?) of SICP with what's in the Scheme standard, which is a pretty small subset of almost any Scheme implementation. In particular, I don't recall much that uses anything specific to MIT Scheme.