I checked out the Snopes.com and it looks like it is a Legend. Here's the link:
http://www.snopes.com/science/stats/spiders.htm
http://www.snopes.com/science/stats/spiders.htm
LOL!!!! Umm...I didn't believe it one bit. Honest.... *ahem*Fear not. This "statistic" was not only made up out of whole cloth, it was invented as an example of the absurd things people will believe simply because they come across them on the Internet.