Prior to the November update, my drain rate (during CS) was about 1.5 % per hour, or 550mW drain. It's now about 3.5% per hour. Every time it goes into connected stand by, the graphics will be 16% and cpu 12%, regardless of the amount of time spent in connected standby (could be 30 minutes or 2 hours). I see people with similar numbers over at answers.microsoft.com - it seems consistent.
Right now, I have hello back on and notifications/wi-fi enabled while in sleep. I've read that some are turning all of this off, but doesn't the defeat the purpose of CS? Why not use hibernate if you don't want to be notified of anything? My device is setup to go into hibernate after 60 minutes, I changed it from the default 120 minutes.
I really wish the numbers were better during CS ..., but I guess that's just how it is right now.