If you get low download rates, I recommend to stop the launcher and start it again. It seems the torrent tracker is struggling a bit and you might have started when it was not available. Then it might take 10 or more minutes until it rechecks the tracker, so you might only see the webseeds.
Anyway, it´s just a bit crowded currently. Some people get really good download rates, others might be slow, but its all changing very quickly. Just be patient