Guys, this is not a generalization but it may help others who are trying to immigrate to Canada by having a higher probability of not going in security screening. Please keep in mind that I am saying "probability" after looking at a number of applications from my friends and family circle. This also relates to many of the Pakistanis who are on this forum. If anyone wants to copy this text to another thread, they are more than welcome to do it.
For Pakistanis:
1. I have seen a number of applications who applied from Pakistan, without provincial nomination, who got their COPR within the six month period. So first point to consider here is that going for provincial nomination, especially for Pakistanis, may cause your application to go in security screening. The reasoning behind this is only known to CIC. But here is the interesting fact. All those who had British Columbia Nomination got their COPR within 180 days. The only issue is with Ontario Nomination.
2. All Pakistanis, who apply from Middle Eastern countries also have a bright chance of avoiding the security screening as per CIC, those regions are much more secured areas. I am not talking about Iraq, Iran or Syria here. The general trend is getting COPR within 3-4 months after you submitted your application.
3. Pakistanis who are applying from Canada and don't have Canadian experience and applied on the basis on FSW, may have a higher chance of avoiding security screening also.
Therefore, Pakistanis need to be very careful of getting a provincial nomination from Ontario. Although this give you 600 points, but it may have its side effects also. There may be a higher probability of getting into security screening.
But that being said, every application is different. There may a number of reasons behind falling into the death trap of security screening. I have posted my experience with security screening. I too was an OINP nominee got stuck in security screening as detailed in my signature. To avoid this process, you may want to consider other routes or increase your CRS.