since we are stuck with this...keyfarming
There’s a guy on reddit that is still doing it in a little over 20 minutes by leveling to 10 with cooking. Cost him about a G and a half though, but some players are currently trying to investigate ways of doing it with solely karma purchased food.
Yah is the cooking to level 10 reddit post. http://www.reddit.com/r/Guildwars2/comments/2g0cx2/key_farming_post_09092014_patch/