Comment 7 for bug 237391

I disagree, sorry. Other people have already pointed out a number of reasons. You mention that RSA needs a larger key size, but note that ssh-keygen already defaults to 2048-bit RSA keys.

The main reason why DSA used to be preferred by many people was that the RSA algorithm was subject to patents. Those patents have since expired.

If you think you can make a solid cryptographic argument that DSA should be the default, then you should make that argument on openssh-unix-dev (see http://www.openssh.org/list.html) rather than here. I don't feel that your argument is solid based on what I've seen, so I would rather not be in the position of forwarding it myself.

A number of the links you posted refer to performance considerations. I rather doubt that this is or should be considered relevant for SSH keys.