Warren Buffett asserted at the 2005 Berkshire Hathaway annual meeting:

Businesses do not meet expectations quarter after quarter and year after year. It just isn’t in the nature of running businesses. And, in our view, people that predict precisely what the future will be are either kidding investors, or they’re kidding themselves, or they’re kidding both. Charlie and I have been around the culture, sometimes on the board, where the ego of the CEO became very involved in meeting predictions which were impossible, really, over time. And everybody in the organization knew, because they were very public about it, what these predictions were and they knew that their CEO was going to look bad if they weren’t met. And that can lead to a lot of bad things.