This is a good addition.
However, as the rest of the development features, it needs to be released in an official release to become effective.
That is also true for the development games as they involve a little portion of the Tremulous community which includes players ranging from novice to pro.
Beginners can't join the games because they don't have a decent client with http downloads(and those prompts). In return, development games are less effective.
IMO, It would be better if the developers updated the clients in the downloads section. It doesn't need to contain any major changes.
cURL is crazy fast by comparison.
Now, that is a little bit confusing. But I guess you mean the http downloads(and that is if the server allows fast downloads).
This fact is statistically correct.