Yep, that is true. And it can be very agonizing for some folks who take pains to collect the documentation and then pin their hopes on the change of fortune with the acceptance of their application. Not to forget that Buffalo can sometime take a year or years to come to a decision. Based on what I know, it is easier to immigrate to New Zealand, Australia, or even Denmark than Canada, especially if lady luck is not in your favor. I have known of cases that have been finalized in 3 months by some visa offices. I also believe NOC plays an important role. If your NOC is very much in demand in Canada, they may expedite your application because of a shortage of such skills in Canada.
Mark