As expected, developers with early access to Apple silicon-based transition kits have leaked some early benchmarks scores. And it’s bad news for Surface Pro X and Windows 10 on ARM fans. Thurrott reports: According to multiple Geekbench scores, the Apple Developer Transition Kit — a Mac Mini-like device with an Apple A12Z system-on-a-chip (SoC), 16 GB of RAM, and 512 GB…