> It does not sound like an outcome that big coffee paid for it to be so:

Who said anything about big coffee? These guys might be a secret, anti-coffee organisation. /s

Ah yes, yet another in the long line of results which confirm our suspicion of water being wet to have been right all along. In this case it's something that anyone who has spent a significant amount of time around routine coffee drinkers and regularly consumed it themselves already took for granted.

Do they though? Any data on that? Also, the highly caffeinated people might also be sleep deprived, which impacts memory and emotional regulation