NY Times sends incorrect mime-type header for their OPML feed

The NY Times provides an OPML feed that lists their RSS feeds, but they are currently sending the wrong Content-Type with the HTTP response:

Content-Type: text/plain

According to the OPML spec (and, believe me, I’m using the term “spec” loosely), the correct Content-Type should be text/xml, text/x-opml or text/html depending on what the client says it can support.

Does this matter? Well, do web standards matter (only answer this question if you are willing to consider OPML a standard)? More importantly, this is just another indication that I’m spending too much time looking at HTTP headers.