This is big question among our people that why our intelligence agencies could not find bin laden's compound. But people tend to forget that there are 100s of such compounds owned by Blackwater in in all cities of Pakistan and no intelligence personal can even touch their wall. So they might be thinking it one of them.
As for as walls are concerned, I myself have seen that area just a month ago. All homes have similar walls. The size of home was also not "significant" when compared to a crook politician or even a retired police officer. So it is useless to talk about this.
But I think now our security forces should use this event as an excuse to check each and every suspected Blackwater hideout all over the Pakistan. If anyone resists we should bomb that place in the name of Al-Qaida. I wish someone can do this.