A whole crop of new tablets rose to challenge the iPad this fall, from Amazon's latest Kindle Fires to the much-hyped Microsoft Surface. However, if a recent study looking at tablet web usage is to be believed, they're not doing so well.
According to online ad network Chitika, for every 100 ad impressions generated by people surfing the web in iPads, only 4.88 come from Kindle Fires. And that's the strongest performer among all challengers -- most others, including Google's Nexuses, the BlackBerry PlayBook and the Barnes & Noble Nook family, serve only about one impression for every 100 served by the iPad. (Full table below.)