I don’t agree so. My experience told me that an offer will be used by the seller’s agent to stir up the bidding.
I offered a good price for a new home recently below the asking price. The sales girl told me they would take it but it would take three days to pass the accounting etc. Three days later, she called and told me that some one offered above the asking price and they decided to give him the offer.
Think about this scenario: you walk into a house that you want to buy, but you are still hesitate about how the price. Then you are told there has already been an offer. What would you do? If you want to get the house, you’ll likely to offer above the asking price, because you don’t know that offer was way below it. The problem with new home is that you cannot set the offer limit fo 24 hours.