HTC’s share of traffic in the mobile market has declined — dropping 60% in five months, according to Chitika Research (http://www.chitika.com), a full-service on-line advertising network serving over two billion monthly impressions across more than 80,000 websites. What’s more revenues are down 35% year-over-year.

In order to determine the actual level of market share HTC is losing as seen on its network, Chitika Insights conducted a study analyzing data from October 2011 through March 2012. During the span of our study, Apple’s market share grew from 46.84% to 76.88%, an increase of 64.13%. Over this same duration, HTC’s overall web traffic share fell from 18.22% to 7.28%, a decrease of 60.04%.

Apple is not the only threat to HTC. There are a wide variety of other Android manufacturers vying for dominance in the marketplace. It seems as if HTC is afflicted with a lack of product differentiation, says Chitika.