Thanks for a suberbly objective review.
I have the 4k version. A simple check with camera doesn't reveal obvious pwm strobing. I bought it not just for the screen but as importantly for the 1TB SSD.
General impression so far is of a very nicely designed and built computer. My one, subjective, quibble is that the fight to make this machine as light as it is has led to the back being made of metal that feels thinner than the average beer can. It tends to flex and click when I handle the machine. A protective slip case is on my Christmas wish-list.
I bought my Yoga knowing that the higher performance display would drain the battery more quickly than the headline figures suggest. A full charge looks to give me around 7 hours of normal word processing, spreadsheet bashing, surfing and presentation prep. Acceptabl but not special. I have no view of what video display or intensive gaming might do to battery life.