Board Thread:Game discussion/@comment-6110700-20130207032959/@comment-173.189.222.243-20130215122117

75.151.228.13 wrote:

You miss the fact that he has a 10 second cooldown on his AD% ability. And it's likely down for last-hitting.

So no, ADC thresh does not work.

The percent AD damage is always active, even if the ability goes on cooldown. It depends on how long it was since you last autoattacked.