By Stefanie Olsen November 5, 2009 5:15 pm November 5, 2009 5:15 pm Update | 11:19 p.m. Made slight clarifications throughout. Hundreds of daily updates come from friends on Facebook and Twitter, but do people actually feel closer to each other? It turns out the size of the average American’s social circle is smaller today than 20 years ago, as measured by the number of self-reported confidants in