I'm not troubled with the (perceived) silence, they've done plenty of talking without words which speak of good measures of progress. Doesn't mean they will cross the finish line, though, with a commercially successful product or products, but that has to be an unknown to everyone (insiders and out) at this point. That simply can't be a certainty right now, or the share price would have already taken off for points north of a buck! Okay, 95% sure it can't be the case yet.
So, unless the whole operation is a sham or scam, which I'm confident it isn't, we, as outside investors, know a good chunk of the status of things. Management is surely signalling optimism - how well based that optimism is? But I do believe it's genuine optimism.