Here's my theory:
According to people's comments on the forum, it's quite obvious to me that CPC is now working on second half of May, if not even beginning of June.
I think that, when CIC updated the webpage every week with 14 days jumps or more since they started speeding up the processing (let's say, processing apps from day "D"), many people whose applications were received around the day D, +/- a few days, used to call CPC to check the status of their apps, and "why there was nothing on their Ecas although their apps were received even a few days before the date D". So, maybe CPC got fed up with too many calls like this. That's why I think they chose not to update the website that often anymore, to reduce the number of calls (or even if people call, they would just give a blunt answer stating what's on the website, like "your app was received in May, but as stated on the website we only got to process apps from April 30).
Maybe they will update the website only when they finished with a month of processing (like when they get to May 30 applications or so), I don't know.
Anyway, it's so good to have this forum. Can actually see the real processing times. (By the way, my app was received at CPC on October 12 2011).
Have a good weekend all!