I've done the CRC DI engine cleaner treatment on both our cars. The turbo is about 6" away from the entry point of the cleaner on these engines. They both didn't care and run fine. One has had 40k on it since its first treatment, and its still running like new. Both have had spark plugs replaced since then, no physical damage or strange deposits on them.
Not saying all turbos will tolerate it, but this is a pretty extreme case. Steer clear of the MAF sensor, IAT / MAP shouldn't care about the cleaner much, if at all.
Did a Focus ST a few weeks ago, no ill effects either, but that has a traditional turbo on the rear of the engine design.