Avoid "tick" jargon in componentDidMount docs (#415)

content/docs/reference-react-component.md

@@ -188,7 +188,7 @@ componentDidMount()
 
 This method is a good place to set up any subscriptions. If you do that, don't forget to unsubscribe in `componentWillUnmount()`.
 
-Calling `setState()` in this method will trigger an extra rendering, but it is guaranteed to flush during the same tick. This guarantees that even though the `render()` will be called twice in this case, the user won't see the intermediate state. Use this pattern with caution because it often causes performance issues. It can, however, be necessary for cases like modals and tooltips when you need to measure a DOM node before rendering something that depends on its size or position.
+Calling `setState()` in this method will trigger an extra rendering, but it will happen before the browser updates the screen. This guarantees that even though the `render()` will be called twice in this case, the user won't see the intermediate state. Use this pattern with caution because it often causes performance issues. It can, however, be necessary for cases like modals and tooltips when you need to measure a DOM node before rendering something that depends on its size or position.
 
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