The NYT got it half-right (that's better than their average!). Glenn Beck has gathered hundreds of thousands, but Al Sharpton has gathered merely "a few hundred" people to a small school near D.C.'s convention center. The mall is a Glenn Beck rally, and there's nary a whiff of any kind of counter-protest, much less a presence from Al Sharpton.
There is no equivalence between these two rallies. That won't stop the MSM from trying to portray them as 'competing' gatherings, though.