CSS Shorthand Efficiency
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What is the difference in efficiency between `background-color: #BADA55;` and `background: BADA55;`? I realize it's quite trivial, but is there a difference in how the browser extracts the values of each. Also, on a slightly related note, on [CSS3Please][1] I noticed that for linear-gradients they specified them using `background-image`. Is there any reason not to simply use `background`?


  [1]: http://css3please.com