Received my new XPS 13 yesterday. Coil whine is very loud under high graphics load (such as watching a 4K video) to the point where you can hear clear clicking and screeching several feet away. Disabling Intel TurboBoost in the BIOS made it much quieter, but you can still clearly hear it in a quiet room. It's unfortunate, because apart from this huge issue I love the laptop.
