Rather convenient that this claim, without any supporting evidence, comes to light after the OBL raid, when the US is trying to justify its decision to not inform Pakistan about the raid ..
Please remember that Pakistan issued a detailed rebuttal to the US claims of 'informing the PA about explosives factories' - it did not deny that the US had informed it about the factories, but it did argue that the US did not give the PA enough time, and the militants were already vacating the factories at the time the PA was mobilizing a raid - some officials even argued that the US used the entire incident as a 'set-up', informing Pakistan about the factories and tipping off the militants itself in order to make it look like the PA was the one tipping off the militants.
A raid on random militant facilities would also be handled differently than a top secret raid to capture OBL, so while in the former the chances of militants picking up military movement (convoys involving the FC/PA etc.) would increase given militant spies and informers in the surrounding communities, the chances of OBL being tipped off on a secret (likely airborne) raid by Pakistani special forces and intelligence operatives would be negligible to none.
One cannot be used as justification for the other - all this, as I already said, pretty much smacks of a US orchestrated campaign of misinformation and propaganda to discredit Pakistan and justify the decision to not inform Pakistan about the OBL raid in advance.