How fast is the speed of dark?

[Darzinth]

is almost like a half a glass of water. Is it half empty, or is it half full?

For the pessimist the glass is half empty.
For the optimist the glass is half full.
For the engineer the glass is twice too big.

I laughed when I readed that joke the first time.

Off Topic from the OP, but its the most interesting.