Eyewitness accounts are among the least accurate pieces of evidence. There have been many studies demonstrating this. Which is why I suggested measuring it with a readily available instrument. Apparently that is a silly idea, though. What is really silly is the number of people that hee and haw about this but refuse to actually prove it despite claiming that the difference is "dramatic"; if it is so dramatic, measuring it, even with crude instrumentation, should be easy.
robert