Gold filled / filled gold wire

This post is a rant about a question which periodically returns to bug me.
If you have a view on the subject please leave a comment.

I spend a fair amount of time looking at web sites relating to jewellery (jewelry), primarily because I am currently fixated upon trying to regain a decent placement in Google's search results, and I often see entries for items made using "gold filled wire".

The term is used (as far as I understand) to referrer to wire, which has a gold skin and a base metal (usually brass) or silver core. There is some legislation (depending on where you are) which details the minimum percentage of gold weight that the wire has to have in order to be able to use the term. Which is what makes it different from gold plated wire etc. If I sound a little unsure that's because I don't use the stuff myself.

But: shouldn't it be termed "filled gold wire" instead of "gold filled wire"?!

To me "filled gold wire" implies gold wire, with a "filling". Where as to me "gold filled wire" implies that the filling is gold, which is quite wrong!

I can only assume that this is a marketing term designed to "add value". By shift the emphasis in the phrase towards the word gold.
Moving the word "gold" to the front of the phrase gives it more "weight" psychologically, and "gold filled" also increases this effect. e.g. If I have a bucket filled with water; do I have more "bucket", or more "water"?

If this counts as deception, then it's deception on a grand scale. When I googled "gold filled wire" I got 71,300 results. Where as there were only 796 results for "filled gold wire".

Maybe I am wrong, or my weak grammar has me painted into a corner.
Is there a difference at all?!

Gold filled wire, or filled gold wire?