BedSupperclub - 4:53 am on Jul 3, 2013 (gmt 0)
That between the lines they're saying my site is a low grade site not worth sporting adsense. I guess the tech team didn't really check the CTR drop (they just told my manager that I should focus on decreasing my spam rate).
Anyway, I called my manager, tried to explain again, she said she'd try to help. Meanwhile she suggested to switch all my ad units to image ads (since the ctr drop is mainly on text ads) to check what happens...
No real hope here though... I may wait 2 or 3 more days but then I'll just switch to tribal if it's not fixed.
Email or call or both your ad managers and Adsense support, maybe someone will really help at the end.