A bit of a variation from the baby seat robbers. You know what they say a change is as good as a rest!
Either way it’s not true. According to About.com this has been doing rounds in various formats since 2009. There was no proof then and there is no proof now.
What I do love about this hoax is the science bit (concentrate); Someone, somewhere has calculated that egg mixed with water and thrown at a windscreen reduces vision by 92.5%. Sounds ridiculous.
Reminds me of another favourite saying, “Approximately 92.78% of all statistics are made up on the spot”