They've measured that too. Here's the video: https://www.youtube.com/watch?v=tuJlgzcQWAg https://www.youtube.com/watch?v=tuJlgzcQWAg It's an hour long and ver

They've measured that too. Here's the video: https://www.youtube.com/watch?v=tuJlgzcQWAg https://www.youtube.com/watch?v=tuJlgzcQWAg It's an hour long and very informative. The research seems well backed up.