As I said in my post, it is still slower with 1.8 than it was with 1.7. For me though it was significantly faster with 1.8 and AoW enabled than 1.8 without AoW enabled. Also understand I am not referring to save game lag - only general slowness progressing time. I'm pretty sure there are other lag issues as well when mousing over things other people are experiencing.Your assumptions are faulty.
I have AoW and I'm still experiencing lag. With or without the DLC(s) enabled.
As it stands I've heard about 3 performance issues and here are some *possible* solutions:
1) Save game lag/ironman lag: Turn off compressed saves
2) General slowness progressing time (slower time for a year to pass): Enable AoW
3) Hanging when bringing up tooltip text: no idea
I didn't spend a huge amount of time testing as last I checked I'm not on PI's payroll, but this is what I've found in my limited testing and reading the forums.