Using <option selected="..."> is the standard way to set a value on a <select> component. Yet, React uses another convention: http://facebook.github.io/react/docs/forms.html#why-select-value
We should add a warning when the value is being set on the <option> and tell the developer to put value on the <select> in DEV.
Example: http://jsfiddle.net/vjeux/LT6Bw/