my 2 cents.... most often that not, whenever I meet punjabis from western Punjab, we get along just fine, better than if I meet people from Karachi or UP and I have been told about this mutual feeling from them too.
But then again there are I have met some rotten eggs though form a minority and mostly you can tell that they are not the educated lot or just madrassa educated. It so happens sometimes, that me and a fellow punjabi from the Pak would be in a jovial conversation and a fellow Punjabi from western Punjab too joins in, and he would try to communicate with me in the best of broken english while having a conversation with the other in Punjabi. And 10 out of 10 times these are the ones working low level jobs while the decent ones come from a more educated background.
Few things I found out talking to Pakistan Punjabis.... (not the madrassa or egoistically religious type) (All these are well before any of my exposure to PDF)
1. Many feel One Nation, Two Countries
2. Jeene Lahore nahi vekhya onney kakh ni vekhya
3. Loved Musharraf, hated Zardari, similar towards NS. And not many think highly of IK as a politician either
4. Not really any animosity towards Eastern Punjabis but not a fan of rightwings on this side of the border but then again who will!
As for me, I'm Punjabi (obviously), not Sikh, and in a group of Punjabis (Hindus, Sikhs, Muslims) we all get along just fine, without religion or politics coming into play. Hence to me defence.pk is a very fun to browse website. Now, if only, it was in Punjabi.......