My documents was delivered on 23 Jan and still no AOR so i send them an email to ask that it is almost 6 week now and no AOR and i got below reply.
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IQAS is currently processing mail received on the week of January 8, 2018, once they get into January 23rd an email confirmation will be sent to you.
Should you have any further questions regarding the IQAS application process, you can contact the IQAS office at 1-780-427-2655.
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so if they are still on 8 Jan so it means they are taking more than 8 week just for AOR and then afteer AOR 12 weeks for ECA
this is total 20 weeks.