I see a lot of worry and counting down to the "six months" date, but my understanding is this is a totally arbitrary date which doesn't really mean a lot. From looking at the various forums and trackers, the 80% approval in six months statistic may no longer be accurate, due to higher volumes of applications since late last year.
The bar in your profile doesn't mean anything much, since it is not based on your file except that it's your AOR date plus six months. The expected completion date seems to never be updated even if CIC knows your file is going to take much more or much less time. I think the bar is only there give an artificial feeling of progress, so people call them less.
That being said, call centre agents are a little more likely to look up details for you if you are past the six months line. So if you are past six months and have not called them, please give that a try! I got lots of useful info from the agent and lots of stress relief (see my previous post about this). The Visa Offices may also periodically try to fast-track files that are past six months, to help with their statistics (total speculation here, but it would make sense).
In terms of what to conclude about your application taking more than six months - the vast majority of reasons are due to bureaucracy, and do not mean your application will be rejected. It's really hard for all of us waiting, with our plans on hold and our futures in the balance, but the six months line does not mean much, and going past it is not a major cause for concern.
If anyone knows differently on any of this, please feel free to comment.