actually, I am as fast as the speed of light... maybe a little faster... anyhow, back to the question. Electric current is slow moving and actually almost sits there and vibrates (thus exciting from one electron to the other). Energy flow, on the other hand, is very fast (and yes, there IS a difference). To say how fast is rather hard, because the the speed of the energy flow is related to the value of the current... small current = low speed energy flow and vice-a-versa. Thats just one thing that affects the speed. The size of the wire (listed above) also does. To find out the speed have to know the amperes, wire diameter/radius, and how many moving electrons per cubic centimer. Once you have this the formula is:
I = amperes
D = wire diameter
Q= moving electrons per cubic centimeter
e = charge per electron
cm/sec = I / Q x e x R ^2 x pi
this is for DC