HTML/JavaScript/jQuery: Should Entities be Used for Dynamically Added Content?

I understand that when coding HTML, this:
<a href="Link?a=1&amp;b=2&amp;c=3">Link</a>
is better than this:
<a href="Link?a=1&b=2&c=3">Link</a>

What about when the content is added dynamically, for example using AJAX?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src=""></script>
<script type="text/javascript">
$(document).ready(function () {

 $('div').append('<a href="Link?a=1&amp;b=2&amp;c=3">Link</a>')
 $('div').append('<a href="Link?a=1&b=2&c=3">Link</a>')



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Julian HansenCommented:
Browse to this link - this is the above code with an alert of the result. (you can also view this in your  console (right click either of the links and then inspect element) (Assumes FF + Firebug)

You will see the links are being converted for you - so bottom line encoding is not necessary.

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