There might be another explaination for the Enabled Chat. Perhaps some hapless soul downloaded one of these files and is now hosting it? It's a bit of a stretch, but possible.

Also, I've always been under the impression that the speed rating in the search results was a combined thing. For example, if 30 modem users had the same file and they came up in search results, would their combined bandwidth potentially be Cable\DSL or T1, based on their upload settings, etc?