what about Punjabis in Karachi? do they speak URDU? do they follow the URBAN culture or they stick to the Punjabi culture when it comes to social interaction?
The point is that in a group of 100 people it is more likely that 20 People who speak a different language will follow the language other 80 speak, even if total number of THEIR language speaking people is 1000 times than those 80 present in THAT group.
same goes with Karachi and Hyderabad. Even Punjabis and Sindhis are in majority* in PAKISTAN*, but in these two cities they are relatively small minority.
I agree with this post, the minority integrates with majority fast and that should be case.
Also he is right where immigrants get settled in numbers in urban areas of Karachi/Hyderabad and became the majority and replaced the pre-partition middle class hinuds.