Informed observers would argue that the US-Pak relationship has always been transactional. In the past Pakistan lobbied for aid and military support on the basis of playing a role as an ally against communism. Even that support from the US was fickle and scant, until there were some real US interests Pakistan could deliver upon, such as the Soviet presence in Afghanistan. The US lobbied the French against providing a reprocessing plant to Pakistan, which pushed Pakistan into the direction of Uranium enrichment and using AQ Khan. The US also sanctioned military supplies to Pakistan several times, in 1965 and 1971 (not certain on the latter), and of course after the nuclear tests.
The US-Pak relationship has therefore never been something to brag about. If anything, by past standards, the current Kerry-Lugar Law and US pronouncements on the US-Pak relationship (we'll leave the sincerity of those comments for another discussion) far outweigh similar US support for Pakistan in the past.
The US relationship with India is being carried out on its own terms, keeping in mind US interests that India can satisfy. But were Pakistan to issue an RFP for 150 fighter jets tomorrow, you can bet that every Western company bidding in India for the MRCA will be in the race for the Pakistani contract, 'public perceptions of Pakistan' be damned.
Money and interests talk, and money and interests will continue to talk. Pakistan just has to ensure that it retains some Western interests, or assuages Western concerns on certain key issues, when NATO decides to leave Afghanistan.