I think 24 months timeline is for getting the decision made on your application, and not for getting update.
agreed totally but they may take 2 years or more for final decision.
I have completed 22 months from docs submission but only got real in process in january,12, till date no update.
Now if i assume 24 months for final decision they must have to issue MR before 45 days of my docs submissio date, means in this week only
that's why i assume that they will take more then 24 months to finalize the case...
I hope i may be exception, who has been processed very late