From what I understand, sorcery is all about focusing attention, archetypes, and strong emotions.
Wands are simply an effective means of focusing attention with a laser like precision, and are still used for just that in classrooms all over the world to this day. Laser pointers are the latest evolution of the magic wand.
The difference between wands, blades, and staffs are the archetypes they naturally invoke. I consider wands to be neutral, or at least I have no personal meanings ascribed to them that I'm aware of. They are usually small, thin, and unobtrusive so that the wand is not the object of focus, but rather what it's pointing at. Blades and staffs on the other hand, are meant to be the object of focus.
Blades invoke the archetypes of separation (cutting), and can also be used for darker more nefarious purposes. The reason Italians require a token form of payment when gifting someone with a knife is to absolve themselves of the associated baggage and archetypes that blade carries. Otherwise, giving that gift knife would be the equivalent of cursing someone, which is the exact opposite intention of the gift.
To me, Staffs seem more solemn and ceremonial. Again I don't have a very well defined archetype for staffs, so that would probably render them pretty ineffective in my hands.