"OK Google... Set a timer for 20 minutes." It seems like a simple request, right? But today, on all Android phones, Google interprets that to mean you want to set an Alarm for 20 minutes from now. It works in a pinch, but it leaves you with a legacy alarm set, and it doesn't offer the nice countdown that a timer does.
The odd thing is, there is a timer function in the Clock app. You can manually set timers, you just can't ask Google Now to do it for you.
Android Police has heard from a source familiar with upcoming Search changes that this small issue will soon be rectified. You'll ask for a timer, and you'll get a timer.
The site even posted a couple screenshots (below), but note that these are not actual shots of the software in action. They're Android Police's mockups. But this is such simple funcationality, we can't imagine it's far off.