I'm suspicious of the "unnamed investors". Has anyone done any fact finding, I'm betting these guys are just looking for PR, and saying they got 1.2m for a "Yo" app is a pretty good way to do it.
On the other hand if they got some money, just not as much as that, then perhaps they could fluff as you suggest. Is this common in your experience? I've heard some reports of other fluffed numbers on HN, ("turned out not to have raised as much as they claimed") but no first-hand experience of anyone doing this.