@Wolfrig
If you like to level as dagger, by all means go for it.
But the topic about swords leveling contra dagger is not controversial.
Even if you save some downtime - in between - while playing dagger, doesn't mean that you save netto time.
But the real decisive factor though is item availability. Swords are always easy to find through instances (wingblade, vanquishers sword, sword of omen, trash blade etc). Daggers are random to find, and you would probably have to invest gold into upgrading like every 5 levels.
In the end its a game, for you to enjoy
But don't ellude yourself into thinking daggers level faster or comes even close to the superior combat specc.