Maybe true in this case but most movies may not have that producer announcement luxury for fear of taxes. There's really not an easy way out .. One way is to unbiasedly produce all reports high or low from various quarters and average them out. That'll need a lot of time and patience .. Overseas reports are mostly authentic (US/UK/Malaysia etc.) In general most will agree on a block buster/super hit vs. average/below average. Its that finer level of sorting that gets to be an issue.