It depends of your strategy.

If the numbers give your start-up a competitive advange, I say go on use it. It will attract customers, make you trustworthy (social proof kind of, be honest though) and scare the competition (or stimulate it, it depends on the strategy).

In the other hand, if your strategy is to make a big BANG at your launch, that you, for example, sell your product/services to small amount of customers, then now, being a ninja is the good way to go. And by small amount I mean an amount you can reach by phone for your start-up to be viable.

There is no such thing as good and bad decision. It depends on, oh.. wait.. your strategy.