Expecting response for Study permit

[Infernus]

Hello,

I had applied for a Canadian study permit on Nov 17th, 2011. On Dec 23rd, 2011, I got a response from Immigration office, New Delhi, India asking me to prove the authenticity of my educational certificates within 30 days.

I mailed a response letter on Dec 29th, 2011 along with additional documentary proof. Its been 3 weeks and I haven't received any word from Immigration office yet. When can I expect a confirmation from them? 

[Habil]

you cant dictate hw they work and theres no time line

[Infernus]

I am not complaining or trying to dictate, just trying to find out the approximate waiting period for their decision after an applicant is asked for clarification and additional documents.