They don't gain much from disclosing anything imo , their competition reads every word they say. I'm not sure it matters that much but as a habit I don't see why they should disclose exact numbers.
Not really: this past few years, listed companies tend to be _very_ pessimistic on their quarterly projection, and then reveal that either: it wasn't that bad, and nothing change, or that is was great, and their valuation shoots up. Weirdly the market doesn't react over those pessimistic projections, so it seems it's just a safe play for CEOs. They started doing that in Europe as well.
