depends on how big you want your starter. To get 1.045 w/ 4 cups of water your going to need half a cup of dme.
here's white labs directions:
White Labs
That's normal. I remembered the first time I used that yeast from white labs, it was only a quarter or 1/3 full of the white labs vial. I asked the LHBS what was up with that, and different strains have different characteristics.
WLP007-dry english ale is chunky.. Check out the Youtube...