It isn't the amount of boke I was referring to. I hope you don't mind me using your photo, but here is a 100% crop that demonstrates the strange concentric rings inside of each boke blur circle (are you saying that funky effect is because the light sources are christmas lights?):
Are the concentric rings a function of the grinding process of the aspheric elements? I noticed it in the 24-70 II, and the rings go away when the blur circle is a lot brighter. It might be that the candles flames also have the same "feature" if the exposure is reduced by a few stops.
You may be right. Looking at several of these lower light bokeh elements, they have the same concentric rings. I´ll have to check it out some more.
The lens is great though. All the images you I have posted are RAW to JPEG straight from the camera, only reduced in size to fit the posting requirements. To be more conclusive about how good the optical performance is, I need to run some parallel testing with other lenses. But so far it looks very good and the hype seem to be well deserved.
The challenge is the manual focusing. Shot wide open, the extreme sharpness exposes mistakes brutally. My capabilities in this department is not what it used to be, probably a combination of lack of practice and fading eyesight, so to get the best from it I need to practice quite a bit.