Interesting review. I agree, it’s still way too early to make anything of this but it’s definitely not the start Lenovo or the Core M was looking for.
Before I purchased my SP3, Yoga Pro 2 (and its successor) were both on my final list of candidates. I went with SP3 because it surpassed YP2 in all aspects, except the keyboard. I might have went with YP3, but I could not wait because I had to replace my laptop for work. I did wonder what I would miss out by not waiting for Broadwell, not only in terms of performance but with regards to weight and portability as well. I was pleasantly surprised to see that while YP3 is thinner by 1.4mm, SP3 is still lighter even with the type cover included in both cases.