u are right, its actualy 3 months, they started the 3 months delivery scene wen sales went low, as there were rumours that prices would go down by 50-60k, So dealers said current invoiced cars are ready delivery new invoice after 3 months.
My mamu booked one, and he told me, abi to 15 din bol raha hai, lekin pehle 3 months bolei they, kaheen latak nae jae.
Since @rizawaan bhae, and others are saying the grey color isnt avalible maybe my mamus car takes a little while.
On booking our car we were told 1 month i.e Feb or march. But wen we booked it the booking order showed a tentative delivery January. and the dealer said most probably ajai gy. We got it in 4 days.
Showrooms have a quota of a number of cars so there are chances of khanchei as well. Since ur in Karachi, personaly visit Central motors the scene is a bit different there, ul know 
