Google showing our urllist.txt in SERPs. Are they stupid or is it me?

[webdevfv]

Google is now showing our urllist.txt in the SERPs.

If I do a "standard product search query" and take a dig I see that G is now presenting the searcher with one of our sitemap files.

Is Google totally bust or have I done something wrong to upset it. Does google not know about the reasons for using urllist.txt

[deadsea]

Switch over to sitemap.xml. That is the standard now. It looks like Google is dropping support for the old urllist.txt.

[sitemaps.org...]

[lucy24]

It's got nothing to do with txt vs xml. If google can get to it, they will index it. So far they have not found a way to index your htaccess file, but give them time.

[deadsea]

I'd never heard of Google indexing a sitemap xml file before.

Then I did a google search for:
allinurl:sitemap.xml
The very first result is Google's own site map. There are several other sitemap.xml sitemap files in the top 30.

Google IS stupid.