For six weeks, he guessed how long a task would take, flipped a coin to decide whether to use AI or code manually, and timed himself. To his surprise, AI slowed him down by an median of 21%—mirroring the METR results.
https://www.technologyreview.com/2025/12/15/1128352/rise-of-ai-coding-developers-2026/
“You remember the jackpots. You don’t remember sitting there plugging tokens into the slot machine for two hours,”