According to this article at the Inq, certain online merchants are adding PR ratings to AMD Duron processors trying to make those look speedier than they really are.

"[COLOR=royalblue]we've seen a Duron 1100MHz chip described as a Duron 1400+ for example[/COLOR]"

We know, of course, such ratings do not exist but then again be aware and do not trust any reseller carrying that kind of misleading information.