One small correction in the article.

On my P37W at least, the headphone jack has a red LED inside it, so it's also a Mini TOSLINK optical S/PDIF output.

I haven't tested it yet (cable on order) but it should work fine to connect to an A/V receiver.

Well I'm pretty impressed with the GPU performance of the 980M in this thin & light notebook, the GPU didn't throttle at all during the Heaven Benchmark gaming stress test you did, and instead ran at max boost the whole time (1126Mhz) - very good!  However, the CPU throttled to what looks like 2.5GHz in the same test, that's not very good at all, and will limit gaming performance on CPU hungry games, this was probably why you got decreased framerates in Metro Last Light after running multiple loops of the game benchmark.  Once again, there are compromises to be made if you're gonna buy a Thin & Light notebook (as opposed to bulkier alternatives) - the CPU and/or GPU often throttles, in this notebook's case it's the CPU.