I don't think Pakistan would have been more successful at raising the issue earlier because the AQ Khan issue had been raised at that time, and Pakistan had nowhere near the checks and balances on its nuclear trade and WMD Command and Control infrastructure that it does currently.
Nor did we have a 'democratically elected government'. Both those issues have been resolved at this point, the AQ Khan network in Pakistan has been busted, he has been under home arrest and isolated to a large degree, and that allows for raising the demand for 'equal treatment' based on effective measures undertaken to resolve almost all outstanding issues and concerns.
One must also remember that the reason the India US nuclear deal has gotten through is primarily because the US ramrodded it through since it wanted to develop a strategic relationship with India, not because India necessarily had a more stellar resume (other than a lot more money to spend on trade) than Pakistan.
That strategic relationship was not offered to Pakistan, and without that 'drive and motivation' from the US, India would likely not have gotten this deal either.
As IC said, the fact that such a demand has nothign to do with 'me too', but rather Pakistan's own energy needs and a demand for equal treatment has been illustrated several times. One only needs to look at Pakistan's current energy requirements, existing civilian nuclear program, and the nuclear energy plans outlined by both the Mushrraf regime and the current GoP.
Whether raising the issue has any effect or not shouldn't govern the GoP's decision to voice its just demand for fair and equal treatment. The US can keep denying it, but given that evidence has also surfaced around India's own proliferation per David Albright, I would say that the US arguments based on "India's proliferation record' are weak, and Pakistan should continue to push its case if only to underscore the double standards.
I dont think AQ khan issue is resolved.
Still US is asking for its access to AQ Khan.
Unless you provide AQ Khan to US it wont be resolved