Been around turbo cars my whole life. Never broke in the turbos. Install, quick start, verify oil pressure and coolant, turn off, restart, idle until reaching operating temp, drive, couple of rolling in boost pulls to verify no boost leaks and proper waste gate management, let sit running of a couple of mins, turn off, check for leaks, restart, let her rip tater chip!
The shaft and bearings run on a film of oil, there is literally nothing to break in. Unless you are self clearancing a turbine or a compressor wheel against their respected housing...which I highly discourage.