>Description: Check the current matched set of elements against a selector, element, or jQuery object and return true if at least one of these elements matches the given arguments. (See [jquery `is`](http://api.jquery.com/is/))

I think it can be rewritten so:
```javascript
function _speedLinksFocused(state) {
    var speedLinks = state.videoSpeedControl.videoSpeedsEl
                                            .find('a.speed_link');

    return speedLinks.is(':focus');
```