I was actually looking forward to the S110, but find it to be a major disappointment. On the contrary, the G15 is better than I expected and thank you Canon for finally return the G series to it roots....FAST LENS!
Count me disappointed, too.
No flippy screen - that rules it out entirely.
Not only that, but it's still missing the GPS and 200/400 fps video modes introduced in the S100!
And also no 1080p/60.
The f/2.8 lens on the G11/G12 is fast enough for me - I don't need a faster lens in a compact (I have a DSLR if I need that, but it doesn't fit in my everyday backpack.)
I'm not at all interested in the G15. I'm going to shop for a used G12 on eBay instead (to replace my G11).