He’s only using the Obama numbers because this is off the cuff.  Obviously, those are more Democratic than usual, but still interesting:

Redistrict Dave Wasserman
Initial calculations: new #IL08, #IL10 and #IL11 are both easily over 62% Obama, new #IL13 is 55%, new #IL17 is 60%. Wow.
The new #IL17 is 3 pts more Democratic than the current “rabbit on a skateboard” and doesn’t even look that egregious!
Off hand I’d say knock about 7 points off those numbers to get typical Dem performance in the Districts.  That’s purely a guess just for disclosure, but still a very good map for Dems.