How to make a starter

I always have to look this up, is it half a quart of water and half a cup of DME? A quart and a half cup? It seems there is conflicting info, Palmer says the later, Wyeast says the former. I'm going with Wyeast on this one, I've copied their starter recipe here:

Starter Recipe:
The optimal media for cell growth and health require using a malt based media (DME) fortified with nutrients. Gravity should be kept near 1.040 and cultures should be grown at 70°F.

Recipe

0.5 cup DME (100g, 3.5oz)

½ tsp Wyeast Nutrient

1qt.(1L) H2O

Mix DME, nutrient, and water.

Boil 20 minutes to sterilize.

Pour into a sanitized flask or jar with loose lid or foil.

Allow to cool to 70°F.

Shake well and add yeast culture.

Timing of Starter:
Because starters are inoculated at high cell densities, growth is usually maximized within 24-36 hours. The gravity of the starter should always be checked prior to inoculation into wort to assure proper cell growth . Cultures should be used immediately, or refrigerated for up to 1 week before using. Cell viability will decrease rapidly if culture are left at ambient temperatures for extended time.