I've always found the more my baby sleeps during the day, the better her night sleeps! IMHO sleep begets sleep. Babies who are awake all day may sleep all night, but only becuase they are completely exhausted - and the sleep they then get is not a good sleep - I never have a good sleep when I am exhuasted so I can understand how a baby can't.

Per your last post - your baby is now having 15 hours a day which is spot on for her age range.