Benson I can say with confidence this cable has been tested and can provide up to 3AMPs of power. Since you are supposedly on the google team, then you will know that the Pixels original OEM charger actually has an output of 5 AMPS. (What 3rd party charger were you using to attempt to charge a pixel with a 3AMP cable, when the pixel demands 5amp output?
These cables have been confirmed and work great with the Nexus 5x and 6P. It even can replace the 12" macbooks charging cable with a proper walll charger. The power output is relied on the actual wall charger. The cable with be able to provide ample power given that the wall charger is correctly powered. Also please note, that batteries charge at different mAh intervals depending on the percent full the battery is at.
Our cables can charge the 5x and 6P units at the same speeds as the stock oem cables.
Benson's counterreply explains that 3 A is actually a violation of the spec, and that the Pixel charger never outputs 5 A, etc.